Unstable Mockery

upon casting this spell roll a D100, if the results are 60 or higher, this spell may be cast as a bonus action.

with your odd and unknown condition you have managed to take advantage of its sporadic nature -
 
You unleash a string sporadic insults and profanity that you manage to lace with subtle enchantments at a creature you can see within range. If the target can hear you (though it need not understand you), it must succeed on a Wisdom saving throw or take 1d6 psychic damage and have disadvantage on the next attack roll it makes before the end of its next turn.

This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).