Plus, being able to warp a game around your commander is good, and youll be drawing a bunch of cards while triggering sacrifice synergies
You can also personalize the front of the proxies with alterations, but ensure these are distinguishable from real cards to avoid confusion
In decks like Ad Nauseam + Tendrils, the card is used either to get enough storm count by drawing free spells or to find your Tendrils of Agony win condition
Ghost of Ramirez DePietro & Glacian, Powerstone Engineer Ghost of Ramirez DePietro & Armix, Filigree Thrasher - Discard a card with Armix, get it back with Ramirez
Sally Sparrow Sally Sparrow allows you to cast creature spells with flash, which is a good trait for a commander
Squelcher, which is a fun riff on Vexing ShusherVexing Shusher, protects combos and acts as a lightning rod for removal that your opponents would much rather use on something actually threatening