Obsessive Skinner is a common Creature — Human Rogue card from Shadows over Innistrad Remastered (SIR), collector number 207.
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.