Temporal Sphere

Chose a point within range. All time travel and time related spells are blocked within a shimmering silvery 20-foot-radius sphere centered on that point for the duration. Any attempt to travel into this location from the past or future will fail. Time continues normally for creatures within the sphere. The sphere cannot be moved, but if a creature inside the sphere moves beyond its boundary, they may then cast time spells, or have time spells cast upon them. The spell blocks travel in either direction through time portals located within the sphere.