Detect Life. The banshee can magically sense the presence of creatures up to 5 miles away that aren’t undead or constructs. She knows the general direction they’re in but not their exact locations.
Incorporeal Movement. The banshee can move through other creatures and objects as if they were difficult terrain. She takes 5 (1d10) force damage if she ends her turn inside an object.
Corrupting Touch. Melee Spell Attack: +8 to hit, reach 5 ft., one target. Hit: 15 (3d8 + 4) necrotic damage.
Horrifying Visage. Each non-undead creature within 60 feet of the banshee that can see her must succeed on a DC 15 Wisdom saving throw or be frightened for 1 minute. A frightened target can repeat the saving throw at the end of each of its turns, with disadvantage if the banshee is within line of sight, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to the banshee’s Horrifying Visage for the next 24 hours.
Ireful Wail (1/Seething Hatred Usage). The banshee releases a wail filled with pure hatred. A wave of necrotic energy is released, centered on the banshee. This wail has no effect on constructs and undead. All other creatures within 120 feet of her that have no barriers between them and the Undead Banshee must make a DC 18 Constitution saving throw. On a failure, a creature drops to 0 hit points. On a success, a creature takes 5d10 + 10 necrotic damage.
This creature has an unlimited number of reactions.
Legendary Resistance (3/Day). If the Undead Banshee fails a saving throw, it can choose to succeed instead.
Caress of the Damned (Costs 1 Action): The Corrupted Banshee casts Chill Touch on a creature within range.
Life Consumption (Costs 2 Actions): The Corrupted Banshee consumes the life force of a creature within 15 feet, dealing (19) 4d8 + 4 necrotic damage, healing for the amount of damage dealt. If the target is undead, Life Consumption kills the creature outright instead, gaining double the undead's current hit points.
Seething Hatred (Costs 3 Actions): Upon there being no targets for life consumption for the first time or upon dropping to half (75) of it's maximum hit points for the first time, the Undead Banshee's eyes will ignite with white flames. The Undead Banshee broods in it's hatred, enabling it to use the Ireful Wail ability.
Description
A merchant of a nearby town is restocking their wares in the display of the booth they've set up recently. From over the din of the bustling towns street, they hear feint cries for help. They begin looking for the origin of the cries but notice that the sound is distant. Distinguishable, but... distant. Suddenly, a cry can be heard, a new one. A cry of terror. It's close. The merchant looks down the street to find a swarm of people fleeing an area, towards them. Behind the mob is a hovering, ugly creature. The merchant recoils in horror. It's clawing through the fleeing townsfolk. They begin to run. A foot. A yard. They turn back in time to see the creature swipe a claw at their back. In the moments before the coup de grâce, they remember it's name. The Banshee.
Banshees that succumb to the banshees curse normally appear as luminous, wispy creatures. Corrupted Banshees take on a more grotesque, zombie-like appearance. Corrupted banshees stand as tall as the elf they were created from, with wild, tangled hair, decrepit clothes, and lacerations and avulsions littering their previously gorgeous skin.
Corrupted Banshees are created when an elf afflicted with the banshee's curse attempt to circumvent the transformation, usually through an attempt at ones own life. The result is a banshee whos curse has not only been expedited, but placed into an incomplete state. Their sorrow is not only rooted in the mourning of their life and resulting curse, but also deeply rooted in the hatred and regret of their failed attempt to circumvent it.
Due to the incomplete nature of the curse, Corrupted Banshees are not bound to the place of their demise. Additionally, a Corrupted Banshee gain the ability to inflict their curse on others, given enough time in close proximity. This leads Corrupted Banshees to have a small force of undead by their side at any time. These cursed undead, while in the presence of an Corrupted Banshee, will reanimate shortly after they are slain unless they were dealt radiant damage within the previous hour of being slain.
Whereas regular banshees experience decay of body and mind but withhold their spirit, the Corrupted Banshee lacks all 3, instead swearing to a dogmatic belief as their only goal. Corrupted Banshees no longer believe in hoarding objects of beauty or vanity like regular banshees. They instead believe that any living creature is a mockery of their attempt at circumventing the banshee's curses effect. A Corrupted Banshee's goal is to silence any living creatures mockery. Permanently. This belief in addition to their lack of binding to their place of demise, leads a Corrupted Banshees to lead their small force of cursed undead through any gathering of living creatures they can find.