KMS U-96

Submerge
Whenever KMS U-96 attacks, look at the top
card of your library. You may put that card
into your graveyard.

Whenever KMS U-96 deals combat damage to
a player, you may cast an instant or sorcery
spell from your graveyard this turn. That spell
costs {2} less to cast. If that spell would be put
into your graveyard, exile it instead.