Collector

Detect Life. The collector can magically sense the presence of creatures up to 5 miles away that aren’t undead or constructs. 

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.

Scythe of dead. Melee Spell Attack: +8 to hit, reach 10 ft., one target. Hit: 14 (3d6 + 4) necrotic damage. Target must succeed in Constitution saving trow DC 15 or its inteligent score is decreased by 1d4. If target´s inteligents score drop to 0 it instantly die. This can be undone by casting Remove curse or similar magic of same or hier level.

Horrifying Visage. Each non-undead creature within 60 feet of the colector that can see her must succeed on a DC 13 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.

Paraside bond (recharge -6). One creature within 30 feet of the collector must succeed on 15 Constitution saving throw, or take 3d8 necrotic damage. Also creature that doesen ´t succeed is paralised. Et the biggining of each turn creature takes another 3d8 necrotic damage. Creature can reapet Constitution saving throw at the end of its turn. Also if collector is conected at least with one creature, collector gain resistence to all damage types and anytime is he hurt, all creatures paralised by paraside bond take same amount of damage as he.