Well after this clarification, I will explain what the redstone monstrosity is:

The Redstone Monstrosity is the boss variant of the Redstone Golem. It appears in the Fiery Forge as the final boss, created by overloading all of the Redstone Cores.

The Redstone Monstrosity appears to be a hulking, mechanical entity made of stone and redstone patches. It appears to have multiple cracks within the body and red outlines within its torso. It has three glowing yellow eyes with the third one on its forehead and a red jaw. It possesses two large horns on its head. The Mooshroom Monstrosity and Redstone Golem are variants of this entity. It is about 5.4 blocks tall (7.2 blocks tall in the 1.6.0.0 trailer update).

more info here :) https://minecraft.fandom.com/wiki/Minecraft_Dungeons:Redstone_Monstrosity

Credits:

Alsa Honggo (Template)

Hola0des: (Photo)