Chilphu, Consumer of All

Trample, indestructible
At the beginning of your upkeep, each player
puts the top card of their library into their
graveyard.
Chilphu, Consumer of All's power and
toughness is equal to the number of cards in all
graveyards.
Chilphu, Consumer of All has all activated
abilities of each creature in each graveyard.
It consumes mindlessly, for it does not differentiate
friend from foe.