bog siren

Multiattack. The bog siren makes two attacks: one with its claws and one with its club.

Claws. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (2d4 + 1) slashing damage and 1d6 acid damage.

Luring Song. The bog siren sings a magical melody. Every humanoid and giant within 300 feet of the bog siren that can hear the song must succeed on a DC 13 Wisdom saving throw or be charmed until the song ends. The bog siren must take a bonus action on its subsequent turns to continue singing. It can stop singing at any time. The song ends if the bog siren is incapacitated.

While charmed by the bog siren, a target is incapacitated and ignores the songs of other harpies. If the charmed target is more than 5 feet away from the bog siren, the target must move on its turn toward the bog siren by the most direct route, trying to get within 5 feet. It doesn't avoid opportunity attacks, but before moving into damaging terrain, such as lava or a pit, and whenever it takes damage from a source other than the bog siren, the target can repeat the saving throw. A charmed target can also repeat the saving throw at the end of each of its turns. If the saving throw is successful, the effect ends on it.

A target that successfully saves is immune to this bog siren's song for the next 24 hours.