Arthur, Merciless Hunter

Whenever a nonhuman creature enters Arthur, Merciless Hunter deals X damage to it, where X
equals Arthurs power.
If a nonhuman creature would be put into a
graveyard from anywhere exile it instead, put a
+1/+1 counter on Arthur, Merciless Hunter and
you gain 1 life.
Now son, you need to understand, these beings might
wear the face of a man and plead with the voice of
one. But do not be mistaken, they are not.