discard any number of cards mtg Cid, Timeless Artificer (#414) Until end of turn Black Discard Deck | Classic

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

If Wizards felt really brave they could even stick it in a Commander precon deck

Borderless Raised Foil Avatar Aang Harness the elements and transform Avatar Aang into Aang, Master of Elements

Looting cards like Likeness Looter are a good way to do this because you can pick and choose which cards to put there from your hand

Bedrock Tortoise's ability doesn't actually change any creature's power