Chorister Bee (5e Creature)
From D&D Wiki
Small beast, unaligned
Innate Spellcasting. The chorister bee's innate spellcasting ability is Charisma (spell save DC 12). It can innately cast the following spells, requiring no components:
3/day: vicious mockery
Sting. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) piercing damage. If the target is a creature, it must make a DC 10 Constitution saving throw. On a failed save, it takes 4 (1d8) poison damage plus 4 (1d8) psychic damage and becomes incapacitated with pain until the end of its next turn; on a success, it takes half as much damage and isn't incapacitated.
A bee the size of a dog, marked with a blazing sigil. It doesn't buzz, but sings in plainsong.