Emet-Selch of the Third Seat Emet-Selch of the Third Seat is a friend to lots of cards whether it is a harmonize or flashback card, or a card like The Indomitable
Just be aware that it does lead to odd interactions, like your opponent getting to Strip Mine your commander
And now, thanks to Magic: The Gathering's Universes Beyond crossover with Fallout, you can take charge of the Mutants, raiders, scientists, and tyrannical armies as they all fight in this irradiated wasteland
Having to always fetch a Stomping Ground + Sacred Foundry immediately, while shocking yourself, opens you up to the same problem the rest of the format has: the amount of damage taken to fix your mana
All of this has given the card a solid niche in cEDH, which is something very few Commanders can claim