Magic The Gathering Cards of types 'Crab' and 'Eldrazi'

Emerge {6}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.) When you cast this spell, you may return target instant or sorcery card from your graveyard to your hand.

Flash (You may cast this spell any time you could cast an instant.) Emerge {7}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.) This creature has hexproof as long as it entered this turn.