School: Chronomancy (Transmutation)
(Intended for use with the Chronomancer subclass)
Temporal Wall creates a thin barrier composed of the mist-smoke of the demiplane of time. The wall cannot be moved once created, but it can be shaped in any way (circles, domes, and so on) and placed anywhere within the spell's range. Anyone trying to pass through this wall in either direction suffers the effects of two cumulative Slow spells and a Temporal Disjunction (Creatures afflicted automatically lose initiative, and are automatically surprised if attacked from stealth. Creatures with multiple Actions automatically lose one Action, all Bonus Actions and all Reactions. Natives to the demiplane of time take 2d6 + 1 per caster level damage). Creatures can make saves against each Slow to avoid their effects, but not against the Temporal Disjunction. Missiles, breath weapons, and spell effects are also slowed by the wall, allowing victims a Dexterity save for half damage. Dispel Magic cannot destroy the wall, but any sort of magical items which destroy magic can affect this spell. Pass Wall, Dimension Door, Teleport, and other travelling spells can be used to bypass or destroy the wall.
The material component is a strand of webbing from a Timeweaver Spider's web.
Based on the 2e AD&D spell of the same name, from the Chronomancer suppliment (TSR 9506).
* - (Timeweaver Spider web strand)
A full list of 50+ Chronomancy spells, plus related monsters, items, backgrounds, etc, can be found in the comments of my Chronomancer (Wizard) subclass here.
https://www.dndbeyond.com/subclasses/6582-chronomancer
Chronomancer, Version 2 - [https://www.dndbeyond.com/subclasses/522102-chronomancer]