Zyra of Flame and Ash

{b/r}: Until end of turn, instant spells you control gain wither (This deals damage to creatures in the form of -1/-1 counters.)
{1}{b}, discard a card: proliferate
{t}{1}{r}: draw a card, discard a card.
{b/r}{b/r}{b/r}: Exile target instant card from your graveyard. Until the end of turn, you may cast a copy of the exiled card without paying its mana cost.

Whenever a creature with a -1/-1 counter on it dies each opponent loses 1 life.