Alkir, Titan of Life's End

When Alkir enters the battlefield, sacrifice it
unless it escaped.
Whenever Alkir enters the battlefield or attacks,
you gain 3 life and each opponent loses 3 life,
then you may deal 3 damage to target permanent
Escape — {w}{w}{b}{b}, Exile five other cards from
your graveyard. (You may cast this card from
your graveyard for its escape cost.)