Sea of Blood

Sacrifice Sea of Blood if there are no creatures in
your graveyard. Opponents may collectively exile
5 creatures from their graveyards to destroy Sea
of Blood. At each end of your turn, choose one:
• Exile a creature from your graveyard, put a
+0/+1 counter on target Human
• Exile a creature from your graveyard, put a
+1/+0 counter on target Vampire
• Sacrifice a creature you own to return target
creature from your graveyard to your hand.