Sin Tainted Slayer

First Strike, Menace, and Reach
{1}{w}: Sin Tainted Slayer gains Indestructible
until the end of the turn.
{r}{g},{t}: Sin Tainted Slayer gets +1/+1, you
target a creature, and they fight.
. If Sin Tainted Slayer fought a Werewolf or
Vampire, or if a Black, Red or Green creatures
fought by Sin Tainted Slayer has died, a
transform it into Baneslayer Werewolf.
"I'm cursed to fight evil until the end of days."