The One Lantern is a Nightmare Unique relic with no boss attached: it drops anywhere in Hell, most often from H10 up (rarer below that home difficulty, never above it), and nowhere else. Every copy is item level 110, and there 0.2% of what falls comes up Unique. It is built on Eternal Lantern Parade Relic — step 6 of the Lantern Parade Relic line, item level 80 and up.

It always rolls the same numbers: +28 Maximum Health, +22 Power, +34 Maximum Health, +28 Power, +45% Summon Damage, +64% Ultimate Generation, +677 Maximum Health and +10% Spell Leech.

One Unique drop in 40 is a Mythical copy: the same item carrying 15–25% Mythical Energy that boosts every stat on it and can never be changed; the 15% floor is 10 times as common as the perfect 25%.

On top of that it carries The One Lantern — Spirit Host raises 1 spirit instead of 3: it hits 3.5 times as hard, lasts twice as long and strikes from 50% farther.

It fires Keeper's Lantern on its own: Clearing a room restores 15% of your maximum health.

Wearing it hands you Spirit Host.

“The parade is one. It is enough.”