Pack Tactics. The gnoll leader has advantage on attack rolls against a creature if at least one of the gnoll leader's allies is within 5 feet of the creature and the ally isn’t incapacitated.
Multiattack. The leader makes two melee attacks.
Corrupted Glaive. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 9 (1d10 + 3) slashing damage plus 4 (1d8){"diceNotation":"1d8","rollType":"damage","rollDamageType":"necrotic"} necrotic damage.
Blighted Roar (Recharge 5–6). The leader emits a terrifying roar infused with necrotic energy. Each creature of the leader's choice within 30 feet must make a DC 13 Constitution saving throw. On a failed save, a creature takes 14 (4d6) necrotic damage and is frightened for 1 minute. On a successful save, a creature takes half damage and isn’t frightened.