There are a lot of powerful upgrades to the archetypes tackled with these Commander decks, like Inventory Management for equipment decks and Strong Back for Voltron decks, but as far as universal cards go, there arent a lot here
Cartel Aristocrat would be my runner-up, and its actually kind of a close call with Cartel Aristocrats recent downshift to common
The Great Henge lets you draw for each Creature that enters play on your side
To be clear, though, the two are very different cards and the main (only) resemblance is the mana cost and power and toughness, but even still Im a believer in Walking Ballista
Tapping a two-mana Elf for five mana is just nutty, and its utility in five-color Commander decks is likely the reason why this rare that debuted in Morningtide retains such an impressive price point ($18.25 median value across all printings)
And then when it, or another Nightmare or Horror arrives to the party, a target exiles cards from their library until they exile a land, which suggests exiling milling
