Command From the Shadows

(Start the game with this conspiracy face up in the command zone.) Players play with each of their commanders face down and secret until they cast them for the first time. (Be sure to tell your opponent you're using this right at the beginning of the game, so they don't reveal their commanders to you yet!)

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6om0s5g0r7pb1hqtukhvb4.