The Blinding Banshee is located in the most northern part of the Desolation’s Edge on the planet Nekrotafeyo.
You can farm Blinding Banshee for these legendary weapons as it is the dedicated loot source for these items. Blinding Banshee has a 30% legendary drop chance.
Blinding Banshee also has a chance to drop the Shrieking Devil. This is a rare Maliwan shotgun that you don’t have to charge but when you do the projectiles will travel further and deal increased damage.