Rough Rhino Cavalry (Avatar: The Last Airbender)

Creature Ñ Human Mercenary - Firebending 2 (Whenever this creature attacks, add {R}{R}. This mana lasts until end of combat.)
Exhaust Ñ {8}: Put two +1/+1 counters on this creature. It gains trample until end of turn. (Activate each exhaust ability only once.)