Temporal cascade

In a tempest of time-warping energy, you channel the power of temporal flux directly into a single target you touch. The target must make an Intelligence saving throw. On a failed save, they suffer devastating mental disruption as their perception of time is violently distorted, taking 14d12 psychic damage. If the saving throw is successful, the target takes half as much damage. Weither the targets save was successful or not, they experience a warped echoes of actions not taken, and alternate selves flash before their eyes, afflicting them with extreme vertigo and migraines, imposing disadvantage on all ability checks until the end of their next turn. This spell taps directly into the fabric of time, a volatile and unpredictable source of energy, making its effects unique to the caster's intent each time it is cast. As such, every casting may differ in outcome slightly, with unexpected temporal glitches potentially boosting or dampening the effect by 1d6 to the damage rolled, in either direction as determined by the DM.