Edeneth's Temporal Relativity Theorem

You touch a willing creature or an object. Any active spells, effects, or other properties limited by time you designate which that creature or object is affected by or is using can have its time limit doubled or halved, your choice. If the creature is unwilling, it must succeed on a Wisdom Saving throw. The spell fails on a successful save.

At Higher Levels: If you cast this spell using a spell slot of 8th level you may make a time-limited property or effect permanent, removing the time limitation entirely. If you cast this spell using a spell slot of 9th level, you may make a time-limited property or effect permanent for up to two creatures or three objects with a ritual cast of 30 minutes.