Acid (PSR Supplement)

**PSR** is an alternate ruleset compatible with most 5e content.
System Differences The Basics Time Shifts Phases The d20 Ability Check Ability Scores Strength Dexterity Constitution Knowledge Perception Charisma Saving Throws Skills Senses Carry Slots	Encounters Group Turns Round‑Table Turns Staggered Turns Your Turn Move Action Bonus Action Reaction Making an Attack Unarmed Strike Sunder Defense Cover	Hit Points & Damage Temporary Hit Points Damage Types Max Damage Other Dangers Defeat Dramatic Death Common Hazards Extreme Climates Conditions Downtime Downtime Trading Downtime Enterprise Rest	Items Goods & Currency Material Goods Weapons Improvised Attire Shields Tools Gear Attunement Objects Damaging Objects Hauling Objects Vehicles Artillery NPCs Mount Cohort Stat Blocks Vulnerability, Resistance, & Immunity

Acid is a damage type.

Caused by corrosive substances, rusting effects, burning pits of acid, and other harmful chemical reactions. Many oozes and some reptiles resist acid damage.
Sources of acid damage may render a creature Exposed, or damage items worn or wielded by the creature.
Constructs made of iron or certain other minerals are sometimes vulnerable to the corrosive nature of acid damage.