Obsessive Skinner is a uncommon Creature — Human Rogue card from Duskmourn: House of Horror Commander (DSC), collector number 191. Current market price: $0.22, TCGplayer market prices via Scryfall.
When this creature enters, put a +1/+1 counter on target creature. Delirium — At the beginning of each opponent's upkeep, if there are four or more card types among cards in your graveyard, put a +1/+1 counter on target creature.