350k hard gives hells reward, offers a 10 sec forcefield, 6 perm walkspeed, 12 speed that fades away, halves max hp per use and if backfired deletes all exits and summons imp mode chase. Math cancer sets to 1 hp and -2 speed if backfired.
Each time you use it'll lose -1 speed, like if you use it second time you get 4+ speed but if you use it 6th time you'll lose Speed ( oh and you take even more damage)