Alena, Slayer of Lycanthropes

Whenever a permanent an opponent controls transforms, you may pay {2}. If you do, exile it.
Whenever a creature dealt damage by Alena,
Slayer of Lycanthropes dies this turn, put a
+1/+1 counter on Alena.
Reach, Double Strike
(Melds with Hal, Rejected Protector)