Azula, Ruthless Firebender — Avatar: The Last Airbender Eternal #184

Firebending 1 (Whenever this creature attacks, add . This mana lasts until end of combat.)

Whenever Azula attacks, you may discard a card. Then you get an experience counter for each player who discarded a card this turn.

: Until end of turn, Azula gets +1/+1 for each experience counter you have and gains menace.