Excalibur, Sword of Eden: With Excalibur from the Assassins Creed 's MTG set, one attack from Knuckles is enough to kill anyone
Most of the powerful additions to the Cube produce degenerate amounts of mana and propel slower controlling decks into the late game, where their most powerful spells can shine
Other takes on this strategy have centered on Brain in a Jar, which has the disadvantage that it can be slow to get going late, but its advantage, in addition to not being an enchantment, is that it has an interesting combination with Days Undoing that allows you to cast Days Undoing on your opponents turn, skipping the end the turn clause, which means that the Days Undoing ends up in your graveyard
While Ragavan is less impressive in Commander than it is in 1v1 Magic, it still sees a ton of play there
(Do mushrooms have muscles?) Feral Thallids spore counter ability doesnt create Saprolings
The Town clause has the potential to be relevant, too, thanks to one particular Land that will appear later on this list #5 | Stolen Uniform Stolen Uniform is a bit of an interesting inclusion on this list