Heart of the Swarm

Put a +1/+1 counter on each creature you
control. Those creatures gain trample until
end of turn.
{3}{g}, Exile Heart of the Swarm from your
graveyard: Proliferate, then proliferate again.
Activate only as a sorcery.
"Armies will be shattered. Worlds will burn.
The swarm is inevitable, and I am the swarm."
- Sarah Kerrigan