Ssn'krss, Naga Priest

Flash, drown 2 (When this creature deals combat
damage to a player or planeswalker you may sacrifice
it. If you do, draw 2 cards.)
When Ssn'krss, Naga Priest enters the
battlefield, counter target spell or ability.
{1}{u}{b}, discard two cards: Return Ssn'krss, Naga Priest from your graveyard to your hand.