mtg commander deck 2021 Magic the Gathering: Innistrad: Crimson Vow and Midnight Hunt Per box Commander (2021 Edition) Commander Set

Mahadi, Emporium Master Rakdos lovers in the eternal formats rejoice

The most common play pattern will be to just make this a 3/3 and then a 4/4, but giving it first strike is real, too

Feather, The Redeemed A Master Of Combat Trickery Combat tricks, or instants and sorceries that grant stat and ability boosts to your creatures for a single turn, are a staple element of Magic that rarely make it into Commander decks

You can activate Arcum for Sewer Cam, untap him, Arcum for Repurposing Bay, sac the Cam to get Corridor Monitor, untap Arcum and hold priority to sac the Monitor for Encroaching Mycosynth, and now you can even sac Arcum to himself to get Mind Over Matter, and use Repurposing Bay to get The One Ring, and now you can fire off the MoM + TOR combo you mention

Doctor's Companion The Doctor hardly travels anywhere or any when without a companion

There will always be a correct one for your deck, so its hard to fit one on this list