Timeless Sanctum

You draw upon the ground, a circle of runes diagrams of time and as the last magical syllable is spoken, the chalk turns invisible. If anyone passes through these runes whilst the spell is being casted, the spell is lost.

This spell can have one of two effects, either to quicken time inside, or outside the circle as the spell creates an extradimensional, time-altering sanctum.

Slow Time: When quickening the time inside the circle, you have and the creatures in the sphere have one hour where everything outside the circle is, relatively to the time inside the sphere, at a halt. 

Accelerate: If you accelerate the time outside the circle, one hour passes in an instant for all inside the circle.

Whilst in effect, creatures inside the sphere can interact with or percieve no creatures or objects outside the circle, as can creatures outside not percieve or interact with creatures inside the sphere. If a creature inside the circle moves out of the circle, the spell is dispelled. No sound penetrates the sphere whilst the spell is in effect, nor does any magic that does not dispel it. The only give-away of the spell is that a creature that passes through the sphere whilst it is in affect but is not affected by it has a strong feeling of Déjá Vu.

One can detect this spell by casting a detect magic and thereby see the circle of runes drawn. Any creature that can see invisible creatures can observe silhouettes of the creatures inside the sphere. A creature within the effect of a timeless sanctum can be scryed on as any other creature, though if the circle is set to fasten the time outside the circle, the creature scryed upon remains in a still and breathless in position. Creatures residing on parallel planes of existence, such as the ether or the shadowfell may be unaffected or affected differently by this spell since time works differently in these planes. An erase spell can end this spell by dispelling the runes, as can any other spell that can dispell the runes.

If the spell is dispelled or the effect is broken by a creature moving outside the sphere, each creature within the sphere takes 2d10 force damage for each hour spend in the Timeless Sanctum as the very fabric of time catches up with them.

At Higher Level: If cast at a higher level than sixth, increase the talteration of time with one hour for each spell slot beyond the fifth used. For each spell slot beyond the sixth that is spend, the amount of magical chalk that is used to cast the spell increases with 100gp worth.