Fell Beast of Mordor Though +1/+1 counter payoffs are commonly white or green, Fell Beast of Mordor gives you a reason to play black with its powerful life drain ability
There are a lot of fun spells that you can run with Edgin as your commander, cards like Wild-Magic Sorcerer which give the first spell you cast from exile cascade, cycling through your library until you find a spell that costs less than the initial spell.
While the upside of picking up a Town and gaining two life isnt huge, in a format dominated by Prowess, any life buffer is nice
A player looking for those cards may want to buy them all at once to cut back on shipping costs
Roaming Throne (Replacing Electric Seaweed) In a deck built around specific creature types, Turtles, Ninjas, and Mutants, there is no greater support piece than Roaming Throne