Conquer Casino runs a free spins offer for existing players. The window is Monday 00:00 GMT to Thursday 23:59 GMT.
A minimum deposit of $20 with code MBOX gives 1 Mystery Box minigame. The box awards 25 to 100 free spins at random; the spins play on slots. The bonus carries a 50x wagering requirement and it's redeemable once per day.
The offer expires on 2026-10-29. It suits players who already hold an account and don't mind depositing during the Monday to Thursday window.
