Grim Gambit

Activate if an opponent action would send a
creature or planeswalker under your control to
the graveyard or exile, or would cause you to lose
the game.
Reveal 3 cards with different names with
converted mana cost 3 or less from your hand,
library or graveyard. Secretly select one.Target opponent selects one. If the opponent did not
select your card, counter the enemy action
and cast the card you selected without paying its
mana cost. Exile Grim Gambit.