The Driftwood King

Vigilance
At the beginning of your end step, put X cards
from the top of your library into your graveyard,
where X is this creature's power.
Whenever another creature you control dies, put
a +1/+1 counter on The Driftwood King.
Pay 4 life: Tap The Driftwood King, it gains
indestructible until end of turn.