New Dungeon World Monster: Sussurus

Sussurus (Solitary, Large, Construct)
Pummel (d10 damage) 19 HP (1 armor)
Near
Special Qualities: Music that soothes the undead, Immune to Illusions and Invisibility
Su·sur·rus: whispering, murmuring, or rustling. 
(Example:"the susurrus of the stream" )
Or... 
A big headless hulk made of honeycombed bone channels? Wind blows through it and makes a sound that forces sleep on the undead? Check and double check. Many a party has destroyed this tomb guardian only to awaken things far worse... 
Instinct: Attacks tomb raiders

Creates undead pacifying music
Guards tombs
Sees with echolocation like a bat
Immune to Illusions and Invisibility