Unstable Time Bubble

You conjure a shimmering, unstable time bubble centered on yourself, warping the temporal fabric within a radius of 120 feet. The bubble persists for up to 3 rounds, creating a localized distortion in time. The area within the bubble is considered difficult terrain for creatures other than you.

At the start of each creature's turn within the time bubble, it must make a Constitution saving throw against your spell save DC. On a failed save, you can choose to affect the creature by one of the following temporal instabilities

1. Temporal Distortion: The creature's movement speed is halved, and it cannot take reactions until the start of its next turn.
2. Temporal Celerity: The creature's movement speed is doubled, and it gain an additional reaction until the start of its next turn.
3. Quantum Flux: The creature has disadvantage on attack rolls and saving throws until the start of its next turn.
4. Quantum Pulse: The creature has advantage on attack rolls and saving throws until the start of its next turn.
5. Chronal Echo: The creature takes 2d6 force damage as echoes of alternate timelines briefly converge upon it.
6. Chronal Reverberation: The creature gain 2d6 temporary hit points as reverberations of alternate timelines briefly converge upon it.

Unless the caster ends the spell earlier. After 3 rounds (at the end of the caster's turn), the time bubble collapses, and reality snaps back to its initial state. All creatures and objects affected by the time bubble are reverted to their positions, conditions, and states as they were at the start of the spell's duration, as if the previous 3 rounds never occurred.
This is a complex paradox spells which can create major anomalies when cast.

"Someone should create a more stable version of this spell"