Yours is the power to wound the prides of others and hide. You know the vicious mockery cantrip, and a creature you target it with has disadvantage on it's saving throw. Furthermore, you gain advantage on Dexterity (stealth) checks you make to hide while lightly obscured.
Your skin and hair turn pale white and your eyes turn into a crimson red as though you were afflicted with albinism. You feel a terrible guilt when attacking elves (all subtypes, includes half-elves) and must roll a wisdom saving throw with a DC of 11 when you attack one. On a success, you do not have to roll this saving throw again for the next 10 minutes. On a failure, you suffer disadvantage on attack rolls against all types of elves for 10 minutes.