Galactus

Trample, indestructible
Devourer of Worlds - Whenever Galactus enters
the battlefield or attacks, each player sacrifices
two lands. Put a +1/+1 counter on Galactus for
each land card put into a graveyard this way.
If Galactus would be put into graveyard from anywhere, reveal Galactus and shuffle it into its
owner's library instead.