Scycxilis,Unstoppable Devourer

Trample,Hexproof
The power and thougness of Scycxilis, Unstoppable Devourer is equal to the
number of cards in your library. When Scycxilis, Unstoppable Devourer enters in batllefield or attack, put 30 cards of your library in your graveyard.
{b/g}{6}:put 20 cards of your graveyard in your library