Each weapon is an in-joke about something connected to Deca’s User-Generated Content or members of the UGC team:
Mister Mango: references an unused bag sprite that resembled a mango.
Butter Bow: references Toastrz, a member of UGC.
K.I.D.D. Force: references Kiddforce, a member of UGC, and the redesign of the Lost Halls which is a UGC dungeon.
Caduceus of Current Craziness: references Atrapper, a member of UGC.
MMace MMurderer: references MMoas, a member of UGC.
Blade of Ages: references Xaklor, a member of UGC.
The Machine was originally conceived to be only for the April Fools event, meaning these weapons were limited availability, however the dungeon was later made a permanent rare godlands drop from the Steel Construct.
Before Exalt Version 126.96.36.199 (Aug 2021), these items were soulbound.