Distortion Strike

You make a melee attack against a creature within five feet of you, your weapon or unarmed strike seems to warble as it is delivered. On hit, the target suffers the normal effects of your attack, and your strike slips through a crack in reality to deliver a chaotic blast of energy to a foe within five feet of your target that you can see. Roll a d8, the roll determines the kind of damage you deal to the second creature with your spellcasting ability modifier being the amount of damage.

At Higher Levels: At 5th level, the melee attack deals an extra 1d8 damage, use this die to determine the of the kind of damage specified on the table on hit, and the damage to the second creature increases to 1d8 + your spellcasting ability modifier.  Both damage rolls increase by 1d8 at 11th level and 17th level.