Obsessive Skinner is particularly sweet with Autumnal Gloom, since the Gloom ensures we have delirium for the Skinner and the Skinner immediately puts a +1/+1 counter on the Gloom during your opponents upkeep, growing it too large for Languish to kill
Third, it draws cards
Drawing a card whenever you cast a spell with mana value 5 or greater is excellent with sweepers like pre-rotation Sunfall, where you can kill every creature and draw a card, with removal spells like Leyline Binding, or with the various Overlords that can enter the battlefield for cheap via impeding, like Overlord of the Hauntwoods
For a just a 2-mana investment, you unlock a 1/1 body with a great enters-the-battlefield trigger
Behold Heads I Win, Tails You Lose , a deck dedicated to having a flipping good time
BONUS PACK ADDED: Each deck includes 3 BONUS RARES to add some fun to unboxing (cards are randomly selected)