Eldritch Awakening

Each opponent mills cards equal to the number of creatures you control. For each creature card
milled this way, create a 1/1 green Tentacle creature token.

{u}{b}{g}: Exile this card from the graveyard and sacrifice three Tentacle creatures, then you may
Return all creature cards from all graveyards to the battlefield as 0/1 black Horrors with “When this creature dies, its controller loses 2 life.