Fake Blood Pack

Adventurers have found a number of uses for these animal blood-filled bladders, which were originally used in theatrical productions. Whenever you take slashing or piercing damage with the fake blood pack under your clothes or armor, roll a DC 11 flat check. On a success, the blood pack is punctured. You or an ally can puncture the hidden pack intentionally with an Interact action. When faking an injury, a punctured blood pack grants a +2 item bonus to relevant Deception checks, such as to Lie about being injured, for 4 hours after the pack has been punctured or until the blood is washed off, whichever comes first. Abilities that trigger when a creature deals bleed damage, that determine if a creature is bleeding, or are otherwise based on bleed damage don't trigger or apply for blood from a fake blood pack, which might mean creatures with such abilities automatically realize the ruse.