Bleeding
Bleeding is a status effect which can occur when a clawed character strikes an opponent in Unarmed Combat. Each turn the monster will lose up to 3% of their current HP per rank of the Claws mutation. Additionally, it causes the opponent to leave blood splotches on the ground wherever it goes so long as the condition lasts.
The following species have claws naturally:
Alternatively, characters under the effect of the Dragon Form spell gain 3 Claws ranks (9%/turn). Yellow draconian players can also inflict bleeding with their acidic breath, and Zin's Recite ability may inflict bleeding against worshipers of other gods.
Insubstantial, undead, demonic, and nonliving monsters are immune to the effects of bleeding, likely due to their lack of blood.