Bleeding is a debuff that makes a hero lose 5% of Health for each stack at the start of  the turn, and increases incoming Physical Damage by 10%.
While in the battle, you can tap and hold the Debuff icon and read what it does.
These are the heroes who can cast this debuff:
  • Snorri (Ability 2)
  • Niya  (Ability 1)
  • Garrett (Passive Ability)
  • Hardorc (Ability 1)
  • Zerra (Ability 2 and 3)
  • Garn (Ability 2)
  • Kiana (Ability 2)
  • Titania (Ability 1)
  • Boreas (Ability 2)
  • Revol (Ability 1)
  • Grock (Ability 3)
  • Toole (Ability 3)
  • Tobald (Ability 1)
  • Archi & Ro (Ability 1 and 2)
  • Bar & Rel (Ability 2)
  • Ace & Sin (Ability 2)
  • Kirri (Ability 1)
  • Shaiya (Ability 1)