Skeletron Prime

. The Skeletron Prime is a hardmode version of the Skeletron boss. It can be summoned with the Mechanical Skull.

Unlike Skeletron, it has four hands with different designs and attacks for each. His eyes are red, his mouth has a chomping animation and when he enters the mode where his head spins, his head grows spikes. The blood animation on the normal Skeletron is replaced with fire on Skeletron Prime.

Like Skeletron, Skeletron Prime must be defeated before the break of dawn; all players will instantly die if he is still alive at that point. To defeat Skeletron Prime it is enough to kill the Head.

Much like the original Skeletron, Skeletron Prime's head will begin spinning permanently should the sun rise during the battle, recieving massive offense and defense bonuses.

Hands
{{Bug| Occasionally, when summoned with the Mechanical Skull, Skeletron Prime does not appear. This is confirmed to happen in Multiplayer and Singleplayer. This might happen if you summon him too close to a house.