Y'Mala, Keeper of Roots

Whenever Y'Mala, Keeper of Roots attacks or blocks, put the top three cards of your library into your graveyard.
Each creature you control gets +1/+1 for each creature in your graveyard that shares a creature type with it.
Legacy - As long as there is a card in your graveyard that shares a creature type with Y'Mala, Keeper of Roots, it gains vigilance.