Last Keeper's Lantern is a Demon Unique relic with no boss attached: it drops in Adventure Mode once you are level 15 or higher, and keeps dropping there however far you go. Every copy is item level 20, and there 0.8% of what falls comes up Unique. It is built on Wisp Charm — step 1 of the Wisp Charm line, item level 1 and up.

It always rolls the same numbers: Relic: kills restore a little Health, +20% Healing Received, +4% Movement Speed, +72 Maximum Health, +35 Armor and -16% Dash Cooldown.

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 Last Keeper — +2 Dash Charges; your dash recovers 40% sooner.

It fires Keeper's Lantern on its own: Clearing a room restores 18% of your maximum health.

Wearing it hands you Spirit Burst.

“It was lit to find the way back. It still is.”