T'Challa, Black Panther

Haste, first strike, hexproof
Kinetic (For every 2 damage dealt to Black
Panther put an kinetic counter on Black Panther)
{t} Remove {x} kinetic counters from Black
Panther and deal {x} damage to any target
Whenever T'Challa, Black Panther attacks,
bolster 1. (Choose a creature with the least
toughness among creatures you control and
put one +1/+1 counter on it.)