Eldrich Mind Wretch

You form a dim glyph with your hands over your mouth and speak an Eldrich word of power. Only you and your target within 10 ft of you can hear it. They must make an intelligence saving throw (DC 18) or suffer 6d6 psychic damage and be stunned 6 rounds minus their INT modifier. On a successful save they take half damage and are not stunned.

When casted at higher levels, deals an additional 2d6 damage for each level. When casted at 9th level, also deals 1d8+1 damage to INT score.