opt card mtg - Single take the more dangerous route. Magic the Gathering Opt Trading

While I'm expecting to see this card used in a lot of different decks, one commander that I'm really interested in seeing it with is Veyran, Voice of Duality

Add in some backup tutors and you have a combo deck

at some point, somebody who has one of the promos will want to sell them, so you can find listings on sites like eBay and TCGplayer

A curve of creatures, most of which with different modes or abilities, backed up by some flexible removal

Alongside cards including Laboratory Maniac, Thassa's Oracle, and Angel's Grace, Ad Nauseam makes for an alternative win condition that will end a game of Commander on the spot