Presage Death

The banshee targets a creature within 60 feet that can hear it predicting its doom. The target makes a DC 14 Wisdom saving throw. On a failure the target takes 11 (2d6 + 4) psychic damage and is magically cursed for 1 hour. While cursed in this way the target has disadvantage on saving throws against the banshees Baleful Wail.

Baleful Wail

The banshee shrieks. All living creatures within 30 feet of it that can hear it make a DC 14 Constitution saving throw. On a failure a creature takes 11 (2d6 + 4) psychic damage. If the creature is cursed by the banshee it drops to 0 hit points instead.