Time loop

You warp time itself to loop again and again. When you finish concentrating on the spell, you go back in time at the exact moment you casted this spell. You repeat this 9 times before the time loop end. When the time loop end, time goes normally, but you find yourself at the exact moment you casted this spell. Whether you die or not during the time loop does not matter, the spell will continue until all 9 uses of the loop are over. During the spell, you can use your action to speed up the time loop's process and prematurely return to the moment you casted this spell. Using this action will spend one use of the loop.