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+---
+     tabtitle: "Pathfinder One-Shot: The crater of Igrevor"
+     title: "Pathfinder One-Shot: The crater of Igrevor"
+     topics: [gaming, writing]
+     pub: "2020-07-10"
+     short_desc: "The first of several one-shot adventures I ran for Pathfinder"
+---
+
+# Preamble to the Pathfinder
+
+For many years now, I've been playing in several Pathfinder games. I very much
+enjoy the system, if only because I love options in roleplaying games. During
+the COVID-19 pandemic and lockdown, in addition to my weekly game, a second
+group started a weekly game. This one, unlike the campaign I've been playing in
+for the last 6 years (we're level 9), sees the characters level up after
+each adventure, and is meant more as a quick and fun string of one-shots. After
+a few weeks of Lizzie starting and running the "campaign," I volunteered to run.
+This post covers my one-shot `The crater of Igrevor`.
+
+## Background
+
+Before hopping in, a little background. The party at this point had gone on
+several adventures and made a name for themselves in a relatively small town.
+They decided to settle down, and because the details of this town weren't known
+at the time, all the players collaborated to establish the Town of Ulriksted. I
+took some liberties with the what we established, and decided that a powerful
+wizard has also moved to the town, seeing it as an opportunity for trade, but
+also a good place for a fancy tower. Wizards love their towers. Thus, Igrevor
+was born.
+
+```
+Igrevor Thel'lessell
+
+Lawful Neutral Elf
+
+Cleric of Abadar: 3 // Wizard (Conjurer: Teleportation): 3 // Mystic Theurge: 10
+```
+
+As a follower of Abadar, Igrevor is very interested in trade and travel, both on
+the material and other planes. His arcane studies also focus on extraplanar
+travel and research. And because I've always been interested in the `Mystic
+Theurge` class, I decided this was a perfect opportunity to make use of it. As a
+trader, I focused his build on several magical crafting feats: wonderous items,
+magical arms and armor, and constructs.
+
+Igrevor's tower sits to the north of town, along the river which flows through
+Ulriksted. He offers his arcane services to the town, as well as crafting and
+selling his magical wares to adventurers when they travel through. Unfortunately
+for him, a powerful [Night
+Hag](https://www.d20pfsrd.com/bestiary/monster-listings/monstrous-humanoids/hag/hag-night)
+has taken an interest in him, and has been haunting his dreams for a while now.
+Being a powerful wizard, he's been able to defend himself and his tower
+accordingly, but the Hag has decided to get some assistance. You see, Igrevor
+has established a powerful teleportation and planar travel system within his
+tower, albeit a well protected one. The Hag, studying this herself, conspired to
+exploit this with the help of a several extraplanar allies: Several
+[Xill](https://www.d20pfsrd.com/bestiary/monster-listings/outsiders/xill)
+raiding parties, to which she provided
+[Nightmare](https://www.d20pfsrd.com/bestiary/monster-listings/outsiders/nightmare/)
+mounts; and two [Umbral
+Dragon](https://www.d20pfsrd.com/bestiary/monster-listings/dragons/dragon/-primal-umbral/umbral-dragon-juvenile)
+brothers.
+
+## The crater of Igrevor
+
+>_While enjoying a pint and a quiet night at Tuckleberry’s tavern, The Leaf and
+>Lyre, the party is rudely interrupted by the sound of a massive explosion,
+>north of town. As they race outside, they see a swirling vortex of colors
+>stretching high into the sky, roughly where Igrevor’s tower is. Screams shortly
+>follow, and as the party pulls their attention closer, they see looming shapes
+>approaching the town._
+
+**Encounter: Xill Raiding Party**
+
+>_Four-armed, flame-red insect-like humanoid creatures, riding upon steeds of
+>smoke and fire_
+
+The first encounter is relatively easy for the party, considering at this point
+they're level 9. There are 4 Xill, each riding a Nightmare. Each has a special
+elemental key, tied to each of the four elemental planes: earth, air, water, and
+fire. The last Xill looted also has a note, written in Infernal: "These keys
+will keep the portals open, and the tower inaccessible. Once you have your new
+hosts, return to the Ethereal plane. DO NOT LOSE THEM!" Whoops.
+
+>_As you move further, the party can clearly see the vortex of colors that now
+>envelop Igrevor’s tower. A chaotic flow of earth, wind, water and fire create an
+>impenetrable globe around what remains of the upper half of the tower, which
+>hangs unsupported in the sky. Beneath it, a crater is all that remains of the
+>bottom of the tower. As the party draws closer, you can make out 4 shimmering
+>portals, at each of the cardinal directions. From each, a distinct color and
+>element can be seen: north, a verdant green and stony landscape identifies a
+>portal to the plane of earth; south, a clear portal surrounded by gusts of
+>strong winds indicate the portal to the plane of air; to the west, a fiery
+>hellscape indicates the portal to the plane of fire; and to the east, a flood of
+>water flowing from the portal to the plane of water. Where the 4 regions meet,
+>the elements clash and swirl about, surging upward, creating the sphere around
+>the tower. As the party takes in the scene, they suddenly receive a Sending from
+>Igrevor: **In dire need of assistance. Tower under attack. Must close portals.
+>Please hurry! WILL REWARD! Use teleportation circle in foyer; top of tower**_
+
+At this point, I also introduce a small mechanic related to the portals: Each
+elemental portal gives the PCs a boon:
+
+- Plane of Earth: DR 1/- for each elemental planar portal open
+- Plane of Fire: Aura, 5ft: 1 fire damage for each elemental planar portal open
+- Plane of Water: Fast Healing 1 for each elemental planar portal open
+- Plane of Air: Bonus 1ft. Movement speed for each elemental planar portal open
+
+Each of these boons is removed as soon an the associated portal is closed.
+
+**Puzzle: The Elemental Portals**
+
+To reach the tower, the party much figure out a way to close the portals.
+Initially, each portal claims a quarter of the ground around the portal. Closing
+a portal causes the adjacent portals to claim the ground, increasing their power
+and decreasing the power of the opposite portal. If coordinated, it should be
+possible for the party to close all portals simultaneously.
+
+>Earth Portal
+>
+>- Trying to close the earth portal causes vines to sprout. If fire is still
+>  open, the fire aura burns away the vines before they can entangle.
+>- Closing the earth portal causes the fire and water portals to increase in
+>  power, and the air portal to decrease in power (modified DC)
+>- Entangle, DC 15: Thorny vines restrict movement and deal damage. Each round,
+>  any creature trying to move through the area must make a reflex save or become
+>  entangled, reducing movement speed to 10 feet and dealing 1d6 acid damage.
+>   - If the Fire or Water portal has been closed, the DC increases by 2, to a
+>     maximum of 19 if both portals are closed.
+>   - If the Air portal has been closed, the DC decreases by 2
+>   - If a creature enters the area with the fire aura, the entangle checks
+>     automatically succeed: The aura from the plane of wire withers the vines as
+>     they try to wrap around you.
+
+>Fire Portal
+>- Trying to close the fire portal causes intense heat waves. If water is still
+>  open, the aura cools the temperature
+>- Closing the fire portal causes earth and air to increase in power, and the
+>  water portal to decrease in power (modified DC)
+>- Heat Waves, DC 15: Intense heat radiating from the portal causes damage and
+>  fatigue. Each round, any creature trying to move through the area must make a
+>  fortitude save or become fatigued and take 1d6 fire damage.
+>   - If the Earth or Wind portal has been closed, the DC increases by 2, to a
+>     maximum of 19 if both portals are closed
+>   - If the water portal has been closed, the DC decreases by 2
+>   - If a creature enters the area with the water aura, the fatigue checks
+>     automatically succeed: The aura for the plane of water cools the area,
+>     keeping the heat at bay.
+
+>Water Portal
+>- Trying to close the water portal causes buffeting waves and sheets of rain to
+>  disorient and hamper the player. If the air portal is still open, the aura
+>  keeps visions clear.
+>- Closing the water portal causes the earth and air portals to increase in
+>  power, and the fire portal to decrease in power (modified DC)
+>- Stormy Weather, DC 15: Torrential rain and slick ground causes difficult
+>  terrain and disorientation. Each round, any creature trying to move through
+>  the area must make a reflex save or fall prone, and a will save or become
+>  disoriented, moving in a random direction (Roll 1d4: 1, move in intended
+>  direction; 2, move to the left; 3, move to the right; 4, move backwards)
+>   - If the Earth or Wind portal has been closed, the DC increases by 2, to a
+>     maximum of 19 if both portals are closed
+>   - If the earth portal has been closed, the DC decreases by 2
+>   - If a creature enters the area with the air aura, there is no risk of
+>     disorientation. If a creature enters the area with the earth aura, there is
+>     no risk of falling.
+
+>Air Portal
+>- Trying to close the air portal causes strong winds and electrical shocks. If
+>  the earth portal is still open, it helps to resist the winds.
+>- Closing the air portal causes the fire and water portals to increase in power,
+>  and the earth portal to decrease in power (modified DC)
+>- Tornado, DC 15: Strong winds buffet and shock. Each round, any creature trying
+>  to move through the area must make a fortitude save or be blown 10 ft away
+>  from the portal, and take 1d6 electricity damage.
+>   - If the water or fire portal has been closed, the DC increases by 2, to a
+>     maximum of 19 if both portals are closed
+>   - If the earth portal has been closed, the DC decreases by 2
+>   - If a creature enters the area with the earth aura, the push checks
+>     automatically succeed: The earth aura grounds you, giving you resistance to
+>     the forceful winds
+
+>_As the last portal closes, the last remnants of the elemental sphere around the
+>tower dissipate. The tower floats silently above the group, with ruins frozen in
+>the air hanging beneath it. The closest pieces, which could be used to climb
+>into the tower proper, are 20 feet in the air._
+
+With the four elemental portals closed, the tower is now accessible. The party
+must somehow ascend 20 feet into the air to get to the lowest ruins, and then a
+Climb (DC 10) check to get to the rest of the tower, 10 feet further up. This,
+like a few other obstacles, was a way to force the party to use resources. The
+sorcerer of the group knows fly, and so this was a way to get him to use a
+spell. The way I tend to run many of my games is to try and force my players to
+think about their resources, and manage them accordingly. To be fair, I try to
+give alternatives. For example, the party could use rope to climb up. I think in
+this case, they used either `Mage Hand` or a familiar to loop rope around some
+rubble, then the fighter climbed up and attached a better rope, and they were
+able to ascend without expending many resources at all.
+
+>_Once inside, there is a corkscrew stairwell along the walls of the tower,
+>ascending roughly another 20 feet. At the top, light and shadows play on the
+>wall near where the stairs enter a new floor._
+
+If the party is perceptive or stealthy enough, they can notice several figures
+waiting on the next floor, as well as get the drop on them!
+
+**Encounter: Xill and Night Hag**
+
+>_A tall, gaunt figure with long limbs stands with two more Xill. Her skin
+>stretches tightly across her bones, and a grin stretches across her nightmarish
+>visage. Claws and fangs betray her intent._
+
+Here, again, I tried to force a change of tactics. The room the party fights in
+is only 20 by 20. The usual `Fireball` approach would be dangerous. The party
+was clever and perceptive, though, and the sorcerer was able to approach the
+room invisibly, and place a `Fireball` in a way so as to kill the Xill. The Hag
+is immune to fire, conveniently, and so the party had to deal with her some
+other way. Also, she can cast `Invisibility` at will, which helper her get the
+drop on the party. The sorcerer `Fireball`'s the room, ducking down the
+stairwell to avoid the blast. While no one can see her, she goes invisible. The
+party doesn't see any threats, enters the room, and she pounces. Hag's are great
+opponents. They have a great kit for DMs to play with; great defenses, including
+damage reduction, a solid set of immunities, and spell resistance 24! The lore
+of hags, as extraplanar scavengers and traders, is also fascinating. I'd like to
+use one in a future campaign, especially an evil campaign, and have this be a
+companion NPC or something.
+
+With this encounter completed, the party stands in the aforementioned foyer, and
+on the ground they see an arcane circle: the teleportation circle.
+
+>_The corpse of the night hag fades into shadow, as it disappears from the
+>material plane. With the room now secured, you see arcane symbols inscribed in
+>the center of the room. This must be the teleportation circle Igrevor mentioned
+>in his sending. As you step into the circle, you find yourself transported to a
+>large, cylindrical room. An inner wall breaks at four equidistant places,
+>revealing an outer wall, and a shimmering pool of light in a small alcove._
+
+>_Exploring the space, the inner room has the teleportation circle, and many
+>arcane symbols drawn into the stone and the walls._ A Knowledge(Arcana) or
+>Spellcraft, DC 15, reveals the symbols to be protections related to
+>teleportation, plane shifting, and the like. _Checking the outer ring, you find
+>the four aforementioned pools, as well as a wall of force blocking a hallway._
+
+>_Oh a whim, you glance up, and see two spheres circling the room. One is pure
+>white, and the other black. They maintain a perfect distance from each other._ A
+>Knowledge(Planes), DC 15, identifies the spheres as being made of pure positive
+>and negative energy, respectively. _You now notice, as the spheres pass by the
+>alcoves, the pools briefly shift towards the color of the sphere, and the wall
+>of force slightly..._
+
+Or, at least, that was the original intention. As so often happens, I wasn't
+quite satisfied with this part of the original adventure, and modified this it
+slightly. Originally, the party was going to fight a "Planar Scion." Initially,
+the party would find two humanoid energy beings, one made of positive energy and
+one made of negative energy. The beings would be indestructible, and the party
+would have to merge them to create a single being, which was now vulnerable.
+But, I couldn't figure out a good way to convey this information, while making
+the combat engaging, in the time I had, so I scrapped it for a puzzle instead.
+
+**Puzzle: Spheres and Pools**
+
+>_As you navigate the room, you find the hallway leading from this room, and an
+>opaque barrier blocking the way forward._
+
+>_Oh a whim, you glance up, and see four spheres circling the room. Two are pure
+>white, and the others black. They maintain a perfect distance from each other._ A
+>Knowledge(Planes), DC 15, identifies the spheres as being made of pure positive
+>and negative energy, respectively. _You now notice, as the spheres pass by the
+>alcoves, the pools briefly shift towards the color of the sphere, and the
+>barrier slightly dissipates_
+
+The only way through this barrier is to stop the rotating spheres. As alluded to
+in the descriptive text, the pools and the spheres are related. As the spheres
+pass over the pools, they shift the pools from clear towards the color of the
+sphere, and I added that the spheres appear to slow down very slightly. The
+party had to use positive and negative energy sources to shift the pools to the
+appropriate attunement, which stopped the spheres, and opened the barrier.
+
+**Final Encounter: Umbral Dragon**
+
+>_As the spheres stop, above the pools, they descend into the pools, and
+> dissolve the barrier blocking the way out of the room. Moving through the
+> hallway, you come to a large meeting hall. An oak table, which could almost
+> seat the entire town of Ulriksted, sits in the middle of the hall, with chairs
+> and tables strewn about. Making your way into hall, you see Igrevor to your
+> right, as he finishes casting a spell and striking down one of two juvenile
+> dragons standing opposite him. He turns to you, and speaks, "The Lords of
+> Ulriksted! And just in time! I am sorry, friends, I cannot assist you further;
+> one of these beasts took most of my arsenal to defeat. I beg your assistance!"
+> As he finishes, you see a sphere arise around him, and him kneel to catch his
+> breath._
+
+The boss battle! The juvenile Umbral Dragon! I toned down the beast a bit, but I
+definitely shouldn't have. It was a good fight, and the barbarian did not hold
+back. As the party defeated them, Igrevor thanked them, and their reward was any
+single magical item that he can make. In addition, because I'm prone to giving
+my PCs overpowered items, I allowed each of them to have an item made from the
+scales of the dragon, which gives them the immunities of the dragon. This turned
+out to be a _very_ powerful option: immune to cold, death effects, negative
+energy, paralysis, sleep.
+
+## Aftermath
+
+I had a lot of fun with this one. The party made their way with through with
+consistent progress, and the boss battle was challenging but not overwhelming. I
+think, if run again, I wouldn't tone down the boss. I ended up running a
+follow-up adventure, which is currently untitled, but which became a two parter,
+and the driving motivation for my upcoming third adventure. I look forward to
+sharing those as well! Feel free to make use of this adventure in your own
+games!
+
+## MapTools
+
+But wait, there's more! This adventure was my first foray into MapTools, a free
+and open-source virtual table top system. It allows you to create detailed
+maps, add tokens, set sight lines, and much more. You can host a server locally
+that your players can connect to, and they can move things around themselves.
+Or, if you're a bit lazier like me, you can share your screen on your voice call
+of choice, and just move the tokens for players instead. I had a lot of fun
+crafting Igrevor's Tower in MapTools, and then sharing that with my players
+during the session. It really made the game more enjoyable, and more immersive
+than just a standard voice-and-video call.
+
+The community for the MapTool suite has built a lot of tokens, tile sets, and
+additional assets to really explore and build _exactly_ what you want. I
+certainly made good use of CSP's Dungeon Geomorphs (available for free directly
+within MapTools, and made by [Kristian
+Richards](https://www.crookedstaff.co.uk/)), [Devin
+Night's](https://immortalnights.com/tokensite/) tokens (some of which are
+available for free, but are well worth the price) and Torstan's Markers and
+Objects (also available directly within MapTools). I'm not sure if the campaign
+will load without those enabled, but for anyone interested, you can find a link
+to the campaign maps for this adventure [here (click to download)](
+{{ site.url }}/src/campaigns/crater_of_igrevor.cmpgn).
+
+
+### 100 Days
+I'm writing this post as part of [#100DaysToOffload](https://100daystooffload),
+an initiative to inspire writing habits. Perhaps you could do the same.
+
+
+### Sources
+
+|----|
+|[MapTools](https://www.rptools.net/toolbox/maptool/)|
diff --git a/src/campaigns/crater_of_igrevor.cmpgn b/src/campaigns/crater_of_igrevor.cmpgn
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