Choose Your Demise is a common Scheme card from Duskmourn: House of Horror Commander (DSC), collector number 331. Current market price: $0.24, TCGplayer market prices via Scryfall.
When you set this scheme in motion, look at the top four cards of your library and separate them into a face-down pile and a face-up pile. An opponent chooses one of those piles. Put the cards in that pile into your hand and the rest on the bottom of your library in any order.