Im sure you could go to town and come up with a bunch of better choices for your ICC, right
Merlin Crab Merlin Goat Merlin Mouse or Rabbit (The only animals he was that fit here alphabetically) Merlin Shapeshifter (Confimed in the deck) Merlin Squirrel (Fits sleeved booster image)
Devour For Power had maybe five cards that let you mill yourself, while Sultai Arisen has 14 at various spots on the curve: Hedron CrabHedron Crab Life from the LoamLife from the Loam Will of the SultaiWill of the Sultai There are 51 cards that mention the graveyard in some capacity, including these excellent grindy midgame pieces: Teval's JudgmentTeval's Judgment Diviner of MistDiviner of Mist Conduit of WorldsConduit of Worlds Kishla SkimmerKishla Skimmer Finally, you need your closers: Lord of ExtinctionLord of Extinction Afterlife from the LoamAfterlife from the Loam Colossal Grave-ReaverColossal Grave-Reaver The deck is just good, not-so-clean, fun with its constant churning of the yard for hijinks and value
Karlach, Fury of Avernus is itself a red commander, but with the added benefit of background as your second commander
In the printing industry, this is simply referred to as "Poker Size." Proxy cards are not legal for use in sanctioned DCI tournaments