I was watching my little brother playing Modded Terraria (Calamity, Recipe Browser, Smart Doors) when he found the underworld lab. Along with that the Murasama. He couldn’t use it yet of course, so he decided to put it in a weapon rack… which promptly deleted the sword and glitched things. He restarted, and luckily got the Murasama back.
He took advantage of the glitch, using it to delete other weapons. One of the weapons though, actually dropped as something else. We then realized that putting modded items in the weapon rack and taking it out causes a random non-modded item to pop out. What item came out seemed to be dependent on the item put in, so we started going through all the modded weapons he found at this stage of the game.
Out of the things he got, the funniest were sandstone bricks with a modifier, and a titanium helmet + drill (He’s in pre-hardmode)