Kerrien, King's Successor

{b}{b}: Destroy target legendary creature. You lose life equal to its power.
{r}{r}: Deal 6 damage to target non-legendary creature. If that creature would die this turn exile it instead.
{b/r}{b/r}{b/r}{b/r}: Deal 6 damage to all non-legendary creatures and then gain life equal to the number of creature that died this turn.