User blog comment:Moltenfire9113/What is the most annoying boss? Comment opinions here!/@comment-8965205-20140304204539

On my main charicter, which i play single player with, the hardest boss i had to face was the twins.

having already beat The Destroyer and Skeletron Prime first attempt it was only until i crafted turtle armour (having been previously using titanium armour) that i was able to beat them.

athough it sounds a bit dumb, the only other boss i have REALLY struggled with is the hardmode dungeon mini-boss that is the Paladin.