Candlekeep Sage

The Backgrounds were built to bolt onto a partner commander, but this one plays a longer game than most of its cycle. Rather than buffing your general or handing it an evasion keyword, it rewrites every commander you own into a two-headed draw engine: each enters or leaves the battlefield for a card, in both directions. That "or leaves" phrasing is what separates it from the pack. Commanders are the one class of permanent guaranteed to bounce in and out of play over a game (returned to the command zone on death, flickered, sacrificed to a Blink deck's engine, recast every turn), and every one of those movements now cashes out. The interaction with commander tax is the quiet joke: the format taxes you for recasting your general, and this makes each recast a paid draw. It scales precisely with how partner-heavy your board is, so it rewards the multi-commander shells the Background system exists to enable in the first place. The catch is dependence: the granted ability lives on commanders, so while your general sits in the command zone rather than on the battlefield, this does nothing. It is inert exactly when you have no commander in play, and it refunds every command-zone shuffle the moment one arrives. That is the cost of an effect that, once online, cashes in on movement you were going to make anyway.