Holding Breath (PSR Supplement)

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PSR is an alternate ruleset compatible with most 5e content.

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Holding Breath


Holding breath is a common hazard. Most creatures need to breathe air. Aquatic creatures need to breathe water, and amphibious creatures need to breathe air or water. Undead, constructs, and some other creatures don't need to breathe.
Holding Breath. You can hold your breath for a number of minutes equal to your Constitution modifier, but not less than 30 seconds (or 5 rounds).
Out of Breath. If you must breathe and can no longer hold your breath, at the end of each of your turns you must succeed on a mark 20 Grit save or fall Unconscious and suffer Exhaustion. If already Unconscious this way, you must succeed on this save or suffer another degree of Exhaustion.