Relic of Progenitus has been one of the premium answers to some strategies: Its cheap, and can play a grindy game removing one card per turn, or one-shot-exiling both graveyards at the right time
You've got a significant selection of morph and disguise creatures to give the deck options , but you also have some creatures that are just generally good without fitting the overall disguise theme (lookin' at you Seedborn Muse and Scourge of the Throne)
I thought long and hard about who would be the Commanderand then it hit me: Morophon, the Boundless
We could call this article right there and happily conclude theres no relationship between deck price and deck power level, but that feels disingenuous when nobody is playing these RL cards in the first place
Cards like Enduring Renewal, Sigil of the New Dawn, Angelic Renewal, and Valkyries Call provide either one-time recursion or permanent recursion with drawbacks for a dearly departed creature