Stitcher's Assistant

Whenever a creature you control deals combat damage to a player, put the top cards of that player's library into their graveyard equal to this creature's toughness.
Delirium- At the beginning of your end step, if there are four or more card types among cards in your graveyard, put a 2/2 black Zombie creature token onto the battlefield if a creature dealt damage to target opponent this turn. Put a +1/+1 counter on Stitcher's Assistant.