Earth Tremor

Bard    Druid    Sorcerer    Wizard

Level 1 Evocation

Casting Time: 1 action
Range: Self (10-foot radius)
Components: V, S
Duration: Instantaneous

You cause a tremor in the ground in a 10-foot radius. Each creature other than you in that area must make a Dexterity saving throw. On a failed save, a creature takes 1d6 bludgeoning damage and is knocked prone. If the ground in that area is loose earth or stone, it becomes difficult terrain until cleared.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.

Source: Elemental Evil, p. 17