For a just a 2-mana investment, you unlock a 1/1 body with a great enters-the-battlefield trigger
Disney Parks Blog: Well, you and the Art Directors nailed it for this set of Enchanted cards
Rem loves to swing, while also protecting you and your stuff
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
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