Tobias' Phantasmal Reality

The caster chooses one creature they can see. The creature must succeed on an intelligence saving throw or have their mind overpowered by an illusory reality of the caster's design, in which time flows differently. The target may perceive themselves running from monsters through a forest, hanging off a sheer cliff over a chasm, or trying to keep above water in a whirlpool.

For each round a creature spends under the effects of this spell, they perceive 24 hours of time spent attempting to preserve themselves within the illusion.

On a successful save, nothing happens and the spell is wasted. On a failed save, the target is Incapacitated, has a speed of 0 and cannot perceive their surroundings and so are blinded and deafened as their mind is transported into the illusion. They also cannot maintain concentration on any spells or similar effects. At the start of each of their turns, they take 1 level of exhaustion. They may repeat the save at the end of each of their turns, ending the spell on a success, but maintaining their current level of exhaustion.