Hyena

Cackling Chorus. If three or more hyenas are all within 30 feet of each other, their cackling, grunts, whoops, and yips create a deafening chorus. A creature that starts its turn within 10 feet of such a hyena must succeed on a DC 10 CON save or be deafened until the start of its next turn. The DC is equal to 8 plus the number of participating hyenas.

Pack Tactics. The hyena has advantage on attack rolls against a creature if at least one of the hyena's allies is within 5 feet of the creature and the ally isn't incapacitated.

Bite. _Melee Weapon Attack:_ +2 to hit, reach 5 ft., one creature. _Hit:_ 3 (1d6) piercing damage.