Crimson, Unholy Paladin

Whenever a player or planeswalker takes
damage, place a life counter on this card.
{r}, Remove a life counter: All creatures gain
+2/+0 until end of turn.
{w}, Remove two life counters: You gain 3 life.
{b}{b}, Remove three life counters: Destroy one creature you control and one creature your
opponents' control.