Ultratron

I know that something similar to this exists, but this is a lot different from the normal skeletron and skeletron prime...

Ultratron is a very difficult boss (or in other words, a superboss) that acts as a challenge for experienced players. The superboss has 3 parts: two razor blades that act as hands, and a head. At first, the eyes will be gray and ultratron will do simple attacks, but as the superbosses' health decreases, its eyes turn red, and the hands will eventually grow spikes. WARNING: It is recommended to get the best war mode armor before trying to tackle this boss. In expert mode, the boss also gets a instakill attack that is clearly visible.

Stats: 400,000 (head)

200,000 each (hands)

Head (gray eyes/first stage) 120 damage

Hands (first stage) 140 damage

Head (second stage) 400 damage

Hands (second stage) 500 damage

Expert instakill: 9999 damage

"AHHHHHHHHHHHHHH"

Definitely Scary...

"Defeat Ultratron, the three-eyed amalgamate of Skeletron Prime"