Yggdrasil, Rebirth Engine

Mana Cost: {3}
Total Cost: 3
Type: Legendary Artifact
Description: When Yggdrasil enters, exile all creature cards from your graveyard.
{T}: Exile the top three cards of your library.
{4}, {T}: Put a creature card exiled with Yggdrasil onto the battlefield under your control. It gains haste until end of turn. Activate only as a sorcery.