Infinite Dimension

Open it from PLAY. Each Dimension runs waves, a miniboss, and a boss. The September chart names these bosses: Scaling endless boss. Card tier on that chart: Mythic to Divine. Easy, Hard, and Nightmare change enemy health and the card table. Nightmare is the accessory farm for several early pieces. An older page put Demon Dimension at level 16 with different bosses. If your selector shows another level, use the selector. Extreme Dimension is a separate October revamp and is not this row.

Account level 85+, then PLAY.

Farm the highest one you can clear. Click Start if another player joins. Cards land on the equipped fighter.