Obsessive Skinner is a uncommon Creature — Human Rogue card from Shadows over Innistrad (SOI), collector number 220. Current market price: $0.23 (foil $0.71), 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.