Aldous, Cursed and Hateful

First strike, deathtouch
Whenever Aldous, Cursed and Hateful destroys a creature, put a +1/+1 counter on Aldous.
You may remove X +1/+1 counters on Aldous
to deal X damage to target planeswalker.
If all +1/+1 counters on Aldous were removed for
this ability, sacrifice Aldous at the beginning of
your untap step.