Lord's Blade Ciaran

Whenever a creature an opponent controls dies,
exile it with a hit counter on it.
Assassins, Mercenaries, and Rogues you control
have deathtouch and "Whenever this creature
deals combat damage to a player, you may remove a hit counter from a card that player owns in exile. If
you do, draw a card and create two Treasure
tokens.
One of the four knights of Gwyn. Possibly involved with Artorias, before he was lost to the abyss.