Tectonic Fracture

You create a 300-foot long fissure on the ground in a line originating from you. When you cast the spell, choose a direction for the ground on either side of the fissure. For the spell’s duration, the ground moves 1 foot in that direction at the start of each of your turns. One side of the fissure may lift or sink below the other side, or both sides of the fissure may move away from each other. If the ground splits, it reveals a 100-foot deep chasm.

Objects, creatures, and structures on the ground move with the side they are on. Structures on the fissure move to the side it is most strongly constructed to. If the GM decides a large structure is evenly on the fissure, the structure may eventually collapse