Killmonger, The Challenger

Dethrone (Whenever this creature attacks the player
with the most life or tied for most life, put a +1/+1
counter on it.)
{t} Remove a +1/+1 counter from Killmonger:
Killmonger fights target creature.
Whenever a +1/+1 counter is placed on a
creature you don't control, Killmonger gains deathtouch until end of turn. Then, untap Killmonger.