Vacuum
Hard vacuum kills through pressure loss, and a body in it loses heat slowly but consciousness quickly. Gas leaving the blood is what ends a character, and a held breath makes it worse.
In play
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Countdown
Without a seal, a creature holds out for a number of rounds equal to its Constitution modifier, minimum 1. At the end of that time its hit points drop to -1, unless they are already lower, and it is dying. It cannot be stabilized or regain hit points until it can breathe.
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Decompressed
Exposure inflicts the Decompressed condition, which a return to pressure does not by itself remove.
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Holding your breath
Holding a breath in vacuum ruptures the lungs. A creature that does so takes 2d6 damage on the first round and gains no benefit from the attempt.
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Sound
Sound does not travel. Verbal spell components, shouted orders and Perception by hearing all fail across open vacuum. Suit comms and touch are the only channels.
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Unfiltered light
Without air to filter it, the star's output arrives unreduced. An hour of unshielded exposure in direct sunlight counts as a failed Contaminated Atmosphere save against radiological dose.
Where it applies
- Accretion Disc
- Asteroid Belt
- Cometary Halo
- Debris Shoal
- Deep Space
- Derelict Hull
- High Orbit
- Hyperlane Corridor
- Lagrange Point
- Low Orbit
- Near Space
- Nebula
- Ore
- Radiation Belt
- Rime
- Ring System
- Ruin
- Stellar Corona
Built for this
- Riftwork Ancestry
- Steady Breath Feat
- Vacuum Trained Feat
- Aurel Militarum Helmet Item
- Cybernetic Respiratory Augment Item
- EVA Combat Boots Item
- EVA Combat Gloves Item
- EVA Combat Helmet Item
- EVA Combat Pants Item
- EVA Combat Suit Item
- EVA Suit Item
- Spectre Helmet Item
- Circle of the Void Subclass