Ceyrene, Tainted Phoenix

Flying, Persist
{u}{r}{b}{b}: Counter target spell or ability that
targets you or a permanent you control. All
opponents take 2 damage. You lose life equal
to the damage dealt this way.
Whenever a spell or ability causes you to discard
an instant or sorcery card, you may sacrifice a
creature. If you do, you may cast a copy of the discarded card with out paying it's mana cost.