Up to 1 minute
You create a seismic disturbance at a point on the ground that you can see within range. For the duration, an intense tremor rips through the ground in a 100' radius circle. Each creature concentrating (on that ground) must make a Con save. If failed, concentration is broken.
Once cast, and with continued concentration, each creature on the affected ground must make a Dex saving throw. If failed, the creature is knocked prone. This spell can have other effects depending on the terrain, as determined by the DM.
1d6 fissures open in locations chosen by the DM. A creature standing where a fissure opens must succeed on a Dex saving throw or fall in.
The tremor deals 50 bludgeoning damage each turn to any structure in contact with the ground. If a structure drops to 0 hit points, it collapses. For more information, see the PHB.
a pinch of dirt, a piece of rock, and a lump of clay