Dungeon Guardian

Info
The Dungeon Guardian appears upon entering the dungeon without killing Skeletron first. The Dungeon Guardian has a massive amount of health, is extremely fast, and has extremely high defense. Dungeon Guardians can spawn in groups, making it even harder fighting against 4-5 of them at the same time.

Tips

 * To avoid being attacked by a Dungeon Guardian use a depth meter to make sure you do not go below 0 feet. You might also want to just avoid going into the Dungeon entirely, at least until you've beaten Skeletron.
 * Due to the Dungeon Guardian's health pool being around 52 times it's normal amount, and it's damage being changed to a 10th of it's defense, the normal chaingun strategy or turtle armor strategy wont work or will be extremely ineffective and risks many more chances to make a mistake and die. The most effective way to defeat the dungeon guardian is to power level your Pierce stat on a high damage weapon.

Raccoon Trivia
It's really annoying to reach the end of the game, after completting every mission and have nothing else to do, right? That's why I added at least a quest about beating this guy as a final challenge on some of the mod versions. I don't really think many people will even try to beat that final quest, but at least It says "It's not over, mwahahaha!".

Ps:. Yeah, I didn't tried completting that request either. I'm not that nuts.