Stun is a that makes a hero skip their next turn. A stunned hero can't dodge, counterattack or assist others.
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 (Passive Ability)
  • Major Shott (Ability 2)
  • Korkhrim (Ability 2)
  • Tromgar (Ability 1)
  • Garn (Ability 3)
  • Sharp (Ability 2)
  • Kang Xi (Ability 1)
  • Lei Zi (Passive Ability)
  • Ember (Ability 2)
  • Baldur (Ability 2)
  • Cent & Turion (Ability 2)
  • Shadar (Ability 2)