Even in a fair deck, Mmmenon is very solid as a Commander
I like to call it a Stinkweed Imp on a stick
Forcing players to tap all of their artifacts and denying any attempt at untapping them, Kill Switch is a surprisingly effective card against all kinds of strategies
Do you feed the fish? is a question as old as Commander, and because of this infamy, many times the Mystic Remora player will sit back and watch as nothing happens for several turns until, eventually, the cumulative upkeep cost becomes too exhaustive, the Mystic Remora is sacrificed, and suddenly the game begins in earnest
No R/B, no Jund, no Grixis, no Aristocratsnothing
Costing five mana to play, with additional investments of mana, Skithiryx is capable of regenerating itself as well as giving itself haste