Mind Sliver

You try to temporarily sliver the mind of one
creature within 60 ft that you can see. If the
target fails an Intelligence saving throw, it takes
1 d6 Psychic damage and subtracts 1 d4 from the
next saving throw it makes before the end of
your next turn.

{e}Upgrade damage + 1 d6 at Lv 5, 11, and 17