Varus, Vengeful Arrow

{t}: Varus, Vengeful Arrow deals damage equal to
his power to target creature.
When a creature you control dies, add 1 Soul
counter on Varus, Vengeful Arrow.
Varus, Vengeful Arrow has +1/+0 for each Soul counter on him.
When Varus, Vengeful Arrow would die, remove
all counters from him and transform him instead.