Magmatic
Planets held in resonance with a larger body, planets young enough to retain the heat of formation, and planets close enough to a star that the day side is a magma ocean. On all three the crust moves and resurfaces on a regular cycle. The Halcyion Federation mines several and the dragons hold several more.
Crossing it
- Navigate
- DC 15
- Forage
- DC 20
- Notice
- DC 12
Charts go out of date quickly. Ash cuts sightlines, and the ground may shift or give way.
Exposure
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Temperatures above about 100 degrees Fahrenheit in shade, or anywhere near a working vent.
CON save, DC 10, rising by 1 for each hour after the first. End of each hour. One level of exhaustion.
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Sealed and armored
A creature in medium or heavy armor, or in a sealed suit without active cooling, has disadvantage on the save.
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Water
A creature with its full water ration has advantage on the save. One without any fails automatically.
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Cooled
Active cooling, a Rift effect naming heat, or Resistance to fire damage removes the save.
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Air that can be breathed and should not be: spore, ash, chlorine, coolant or fallout.
CON save, DC 12. End of each minute. The Poisoned condition until an hour after leaving the atmosphere.
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Filtration
A rebreather or sealed suit removes the check. A filter mask gives advantage on it.
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Visibility
Ash and dense spore make the area heavily obscured beyond Close range, in addition to their other effects.
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Radiological
Where the contaminant is radiological, a failed save also inflicts a level of exhaustion that a long rest will not clear. It is removed by a Medicine check against the same DC, a restorative spell or a course of antiradiation drugs.
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Conversion
A failure in Bloom atmosphere also counts as one day of exposure toward conversion.
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In play
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Resurfacing
Any map older than a decade is wrong about where the ground is. Navigation from an old chart has disadvantage.
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Surface metals
Ores that lie kilometers down on other worlds are exposed here, and they are the only reason to land.
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Unstable crust
New crust supports a load for minutes and then gives way. Moving at more than half speed across an unsurveyed flow requires a DC 13 Dexterity (Acrobatics) check.
Regions on it
- Ash Column An eruption column of ash and gas, and the abrasive, electrically charged fallout downwind of it.
- Vent Field An isolated community of life on the sea floor, fed by hot vents or cold hydrocarbon seeps.
- Volcanic Field Recently resurfaced ground of fresh rock and vented gas, with a surface that may not hold weight.
Magmatic