Brainworm

Select one creature within range. They must make an Intelligence saving throw. On a failure, each time they fail an attack roll, saving throw, or ability check, they take 1d4 psychic damage. On a success, they have disadvantage on their next attack roll, saving throw, or ability check. If they fail, they may repeat the saving throw each time they take damage from anything other than this spell. Creatures with an Intelligence score of 3 or lower cannot be affected by this spell.

The damage dealt by this spell increases by 1d6 every second slot level after 1st.