M'uru

M'uru enters the battlefield with three +1/+1 counters on it.
{t}, Remove a +1/+1 counter from
M'uru: Put a +1/+1 counter on each elf creature
you control.
When M'uru has no +1/+1 counters on it,
sacrifice it. If you do, create Entropius, a legendary 10/10 black Void God creature token with haste.