ERftLW: Alienated Mind

You garble your own thought processes into maddening chaos, then force those thoughts onto everyone around you. Each living creature within a 15-foot sphere originating from you must make an Intelligence saving throw. On a failed save, a creature takes 2d8 psychic damage, and until the end of your next turn it forgets any languages that it knows and is incapable of meaningful communication. On a successful save, the creature takes half as much damage but suffers no other effects.
At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.