Magada, Abyssal Calamity

When this creature enters, reveal cards from the top of your library until you reveal a creature with mana value 6 or less. Put that creature onto the battlefield. Put the rest on the bottom of your library in a random order.

You may cast this spell from your graveyard. If you do, this creature gains haste and "At the end of your turn, put this creature on the bottom of your library."

Once per turn, whenever another creature enters, target opponent discards a card.