Earth Shock

You call upon the spirit of earth to strike your enemy instantly and attempt to disrupt their spells. The target must succeed on a Constitution saving throw or take 2d4 bludgeoning damage, or half as much damage on a successful one. Saving throws made to maintain concentration against this damage are made with disadvantage, and the DC is equal to 10 or the damage dealt (rather than half of the damage).

This spell can be cast as someone else you can see is casting a spell. If they fail the saving throw against this spell, the target must make a concentration check to finish the spell. If they fail, the spell is lost.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 2d4 for each slot level above 1st.