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 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.
- 400,000 (head)
- 200,000 each (hands)
- Head (gray eyes/first stage) 160 damage
- Hands (first stage) 160 damage
- Head (second stage) 400 damage
- Hands (second stage) 500 damage
- Expert instakill: 9999 damage
Definitely Scary..."Defeat Ultratron, the three-eyed amalgamate of Skeletron Prime"