Galley 70
Skeletron Prime
So while fighting Skeletron with my friend I glitched Skeletron into oblivion, and his arms just kinda floated off so the fight never really ended. Since we weren't about to spawn him again I decided to go into the dungeon to see if it still got flagged as a defeat. To no surprise the dungeon guardians came.... But they were unable to hurt me, instead I accidentally found a way to safe spot them in a way that seems quite ridiculous.
GIF for proof
P.S. Slime OP
GIF for proof
P.S. Slime OP