Petty (Charisma)

• Increase your Intelligence, Wisdom, or Charisma by 1, to a maximum of 20.
• You learn the vicious mockery cantrip and can target a creature you perceive within range, not just see. If the target can see you, you can cast this spell with somatic components rather than verbal components. Its spellcasting ability is the ability increased by this feat.
• When a creature you perceive misses with an attack roll or fails a saving throw, you can use your reaction to cast vicious mockery at any creature within range.

Inspired by @M_Allen_Hall on Twitter.