There is a cross of dimensions happening. odd objects are appearing with strange fluctuating shapes before disappearing again.

Also several cracks will be appearing on solid surfaces, allowing anything solid, or contained by a solid, to pass through. Seeming to lead to a mirror version of Marsillion. Left is right and right is left.

The crossing is a rare but natural event that will pass on its own after a fixed time.

Strange objects are going to be appearing and disappearing. These are in fact 4-D objects peeking into 3D space. They can be solid, liquid, or gaseous. The are odd as only 3 of their 4 spacial dimensions are visible at any one time to the people of Marsillion. Some are harmless, some are harmful. Interact with caution.

Cracks are appearing in the walls in Marsillion, appearing like a sideways black breach. They lead to partner crack elsewhere in Marsilion. But this Marsilion is reversed compared to normal. Left is right and right is left. Time, Up, Down, Forward, and Backward still function as normal.

This cracks form and disperse over time, lasting anywhere from hours to days. They takes about 20-30 seconds to open and close and vary in size, they are silent with fixed edges.