Sortilège is a roguelite dice duel. You and your rival throw against each other, and every boon you pass up stays on the table for them to take.
The demo has a full solo run through the academy, all the way to the Elder Geometer, plus online duels with a friend or through Quick Match. The elite rivals behind the locked doors are in the full game, along with more worlds and the dice sets you win from bosses.
If the demo clicks for you, wishlisting the full game is the best way to help.