Echoing Lance

You emit a targeted burst of intense sonic energy at a target
within range. The target must make a Constitution saving
throw. On failure, they take 3d8 thunder damage and
becomes stunned for the duration by the intense sound. On a
successful save, the target takes half as much damage and is
not stunned.
At the end of each of its turns, the target can make another
Constitution saving throw. On a success, the spell ends on the
target, on failure, they take an additional 1d8 thunder from
the echoes within the mind.
At Higher Levels. When you cast this spell using a spell
slot of 5th level or higher, the damage increases by 1d8 for
each slot level above 4th.