Unraveling Causality

You conjure a dense sphere of warped causality at a point you can see within range. It resembles a luminous fold in reality, where time slips and refracts—casting faint afterimages of events that have not yet, or have already, occurred.

The sphere moves up to 20 feet in a straight line immediately after you cast the spell, phasing harmlessly through creatures and objects. At the end of each of your turns, it continues moving 20 feet in the same direction.

As a bonus action on your turn, you can cause the sphere to collapse early. Otherwise, it collapses at the end of your next turn.

Collapse:
When the sphere collapses, causality violently reasserts itself. Each creature within a 20-foot-radius must make a Dexterity saving throw.

• Failed save: the creature takes [roll]6d6[/roll] force damage + [roll]2d6[/roll] psychic damage
• Successful save: the creature takes half as much damage

Temporal Aftershock:
On a failed save, a creature becomes temporally destabilized until the start of your next turn. While destabilized, the creature subtracts [roll]1d4[/roll] from attack rolls and Dexterity saving throws.

optional:  Temporal Nausea:
When the sphere collapses, creatures within a 40-foot radius must make a DC 10 Constitution saving throw as their senses briefly experience time out of order.

On a failed save, the creature's stomach violently disagrees with the nature of reality. It retches uncontrollably until the end of its next turn. (a condition that has no mechanical effect but is deeply embarrassing and produces an awful smell)

At Higher Levels:
When you cast this spell using a spell slot of 4th level or higher, the force damage increases by 1d6 for each slot level above 3rd.

When cast at 5th level or higher, the radius increases to 25 feet, and the Temporal Aftershock penalty becomes 1d6 instead of 1d4.