The Borrowed Hearth is a Demon Unique relic with no boss attached: it drops in Adventure Mode once you are level 73 or higher, and keeps dropping there however far you go. Every copy is item level 78, and there 0.5% of what falls comes up Unique. It is built on Radiant Sanctuary Relic — step 5 of the Sanctuary Relic line, item level 60 and up.

It always rolls the same numbers: +11% Healing Power, +22 Ward, +18% Healing Power, +53 Maximum Health, +358 Maximum Health, +44% Healing Power and +31% Affinity Resistance.

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 Borrowed Hearth — Your Ultimate is 50% larger and heals 30% harder.

It fires Last Light on its own: Below 35% health you gain +110 Ward for 5 s.

Wearing it hands you Sanctuary.

“Warm with a fire lit somewhere else.”