Elvish Pooper

Creatures you control get +8/+8 and gain trample when they enter the battlefield from a graveyard
Planeswalkers played from graveyards start with double loyalty
At the start of each phase gain:{b}{b}{b}{b}{b}{g}{g}{g}{g}{g}
{b}{b}{t}: all players discard a card and sacrifice a creature
{g}{g}{g}{ut}: play any number of cards from all graveyards