Dungeon Dressing: Portcullises 2.0 (5e)
5e
Undead Spellcaster: ?
Banshee: ?
Bound Banshee: Through terrible and dangerous binding magic a necromancer has bound the spirit of a banshee to this portcullis.
Freed Banshee: Through terrible and dangerous binding magic a necromancer has bound the spirit of a banshee to this portcullis. The resultant trap has two distinct phases. First the characters must deal with the wailing portcullis. If they destroy that, they release the bound banshee!
Destroying the portcullis (AC 19, hp 30, damage threshold 5, immune to poison and psychic damage) destroys the trap but releases the banshee.
If the characters destroy the portcullis, the bindings ensnaring the banshee are destroyed and it escapes in the next round. Maddened, it attacks until slain.
Spectre: ?