Mechdusa

Mechdusa is a secret boss that can only be fought in the special  Everything  seed. It is summoned by using an Ocram's razor in an  Everything  world. It is essentially a mashup of all 3 of the mechanical bosses that drop treasure bags even if the player is on classic mode or journey mode and almost resembles a much larger version of medusa The 3 bosses act as separate entities that drop their respective drops and display the chat message '' (Mechanical boss) has been defeated! '' once defeated. However, when it spawned they are all combined into one single entity and are not different bosses moving around all at once. Upon killing the last boss, it drops the Waffle's Iron, a projectile-based melee weapon that fires waffle projectiles similar to the Meowmere.

Trivia
The three Mechanical Bosses can not be fought normally in the Zenith Seed (an alternate name for the "everything" world). Mechdusa is therefore required to progress further in the game.