Level
3rd
Casting Time
1 Action
Range/Area
120 ft
(20 ft )
Components
V, S, M *
Duration
Instantaneous
School
Transmutation
Attack/Save
DEX Save
Damage/Effect
Bludgeoning
Choose a point you can see on the ground within range. A fountain of churned earth and stone erupts in a 20-foot cube centered on that point. Each creature in that area must make a Dexterity saving throw. A creature takes 3d12 bludgeoning damage on a failed save, or half as much damage on a successful one. Additionally, the ground in that area becomes difficult terrain until cleared. Each 5-foot-square portion of the area requires at least 1 minute to clear by hand.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d12 for each slot level above 3rd.
* - (a piece of obsidian)
For Dungeon of The Mad Mage, it says in the adventure that you cannot shape the stonework of the dungeon with magic. In theory then, this spell should not do anything and that is how I ruled it initially. However I am going to change it so that instead of turning up the earth, the caster magically creates the earth for a moment, allowing the damage. It still doesn't create rough terrain but will still allow for some serious damage. Just an option for any DMs like me who don't want spells to be useless in Under Mountain.