Delightful youth

You touch out to a creature, filling their head with pleasant memories of their youth which they never had. Whilst under the effects of this spell the affected creature cannot hear others around them as their memories are loud and too distracting.  For every attack turn the creature takes while the spell is active they must roll a d20. if they roll a 10 or under they automatically role a 1 for their hit dc. If they roll over 10 they automatically roll a hit and deal an extra 2d8 of the weapons damage damage. Once the spell ends the creature collapses to the floor and is unconscious for 6 seconds or 1 turn.