Linger, Titan of Soul's Fetter

When Linger enters the battlefield, sacrifice it unless
it escaped.
Whenever Linger enters the battlefield or attacks,
target creature you control gains +1/+1 and your
choice of deathtough, flying, or lifelink until end of
turn.
Escape—{w}{w}{b}{b}, Exile five other cards from
your graveyard. (You may cast this card from your graveyard for its escape cost.)