Hurklaa, Mistveil Murderer

Deathtouch
{r}{g}: Hurklaa, Mistveil Murderer fights another target creature.
{b}{g}: Until end of turn, prevent all damage that
would be dealt to Hurklaa, Mistveil Murderer.
{b}{r}: Target opponent loses X life, where X is
the number of creature cards in that player's
graveyard.