Abyss Watcher

Exploit

When Abyss Watcher exploits a creature, destroy
each other creature on the battlefield with toughness
less or equal than the exploited creature's toughness.

As long as you have Artorias in your graveyard, at
the end of your opponent's combat phase, if a
creature dealt damage to you this turn, create a token
that's a copy of Abyss Watcher.