Rare drop from Moon Lord
DARK, DARKER , YET DARKER
THE DARKNESS KEEPS GROWING, THE SHADOWS CUTTING DEEPER
PHOTON READINGS NEGATIVE, THIS NEXT EXPERIMENT
SEEMS , VERY, VERY, INTERESTING
WHAT DO YOU TWO THINK 'Error R_264: Explanation is blocked. Still they are inside of stronger bosses.'
While equipped, it allows to all the bosses with more than 66666 hp (most likely post-ML bosses) to drop after death "with 2% chance" an unnamed item.
Mostly harmless. And useless.
Material in Boundary