Banshee of the Song

Detect Life. The Banshee can magically sense the presence of its pinpointed creature up to 5 miles away as long as it is not an undead or constructs. It knows the general direction they’re in but not their exact locations until they get near (about 100 feet) of the pinpointed creature.

Incorporeal Movement. The banshee can move through other creatures and objects as if they were difficult terrain. They takes 5 (1d10) force damage if they end their turn inside an object.

Pinpoint. At the start of the initiative roll, the creature can choose one target also a part of the initiative roll. Attacks with one target may only be made against the pinpointed creature until either the pinpointed creature or the banshee dies. The damage dice of attacks targeting the pinpointed creature are doubled (for example, if an improvised weapon normally deals 1d4, however with the banshee this would increase to 2d4).

Luring Song. The Banshee sings a haunting melody. If its pinpointed target is within 300 feet of the Banshee and can hear the song then the pinpointed target must succeed on a DC 11 Wisdom saving throw or be forced to use its movement on its next turn to move towards the Banshee. The Banshee will continue to use luring song on its next turn but can use its action to stop. The song also ends if the Banshee is incapacitated. 

Scream. A sudden loud noise, painfully intense, erupts from the Banshee. Each creature in a 10-foot-radius sphere of the Banshee must make a DC 10 Constitution saving throw. A creature takes 2d8 thunder damage on a failed save, or half as much damage on a successful one.

Spectral Slash. Melee Weapon Attack: +3 to hit, reach 5 ft., pinpointed target. Hit: 13 (3d6 + 3) slashing damage.