Rubble Step

The target leaves behind a trail of shifting rubble that typically consists of stones, but you could choose another earthen material, such as loose sand or soil. For 2 rounds, when the target willingly moves out of a space, and if the target is in contact with the ground, the ground in that space becomes difficult terrain. The difficult terrain remains for the spell's duration. Heightened (4th) The target leaves difficult terrain behind for 1 minute instead of two rounds, and the spell's duration is 10 minutes.