The tower!

FIuff

Skeletron Prime
floor 3591 forces you to get to the moonlord in 1hp hardcore with the max amount of people in a server on your team, and everyone has paladin's shields and companion cubes.
 

Cinnamon Gum

The Destroyer
floor 3600 has a lone pair of pants. Upon closer inspection, these pants contain every missing piece from every jigsaw puzzle ever.
 

Sylbus

Wall of Flesh
Floor 3601 contains a mask on a table, it seems to be in perfect condition without a single scratch or sign of rust, you feel the urge to put it on.
 
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