School: Chronomancy (Transmutation)
(Intended for use with the Chronomancer subclass)
Duration: 10 minutes / level
Area of Effect: 5 feet radius
This spell creates a temporary bubble around the caster, which is excluded from the flow of time. While inside the bubble, the caster is immune to the passage of time, except as it applies directly to himself. The effect is that the world has frozen between seconds. This gives the caster an opportunity for actions like drinking Healing Potions, or letting a harmful spell, potion, or poison wear off. Once created, the bubble cannot be moved, and the caster cannot leave it without automatically dispelling the effect. Any creatures within the 5-foot radius are considered inside the bubble, and can interact with the caster as if normal time is passing. If they step outside the radius, they are immediately frozen in time until the spell expires, or the caster dispels it. The spell's duration is measured by the caster's subjective time.
The material components of this spell require preparation. A crystal sphere valued at 1,000 gp or better is necessary. A diamond worth at least 5,000 gp must be enchanted with a Temporal Stasis spell and placed within the sphere. The entire device must then be touched by a Time Dimielemental while on the demiplane of time (touching does not have to be made voluntarily). When this spell is cast, the device is consumed by the magical energies.
Based on the 2e AD&D spell Temporal Shell, from the Chronomancer suppliment (TSR 9506).
* - (A 1,000 gp crystal sphere, 5,000 gp enchanted diamond)
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]