A Heart Stone (also spelled Heartstone) is an unusual type of ore mined from deposits which appeared in Solstheim in the Fourth Era. Though deposits of them have been known to exist in the Brothers of Strife ruins in Stonefalls circa 2E 582, it is suspected that the deposits surfaced during the cataclysms of the Red Year; Master Neloth of House Telvanni suspected that the material came from Red Mountain and was flung along with other materials to Solstheim during its eruption. Even two centuries later, they still smolder with the heat of the mountain. These are the molten rocks that lay next to the Heart of Lorkhan for millennia, and some vestige of its power has seeped into them. Heart stones sometimes raise Ash Spawn from the bits of bone buried in the nearby ash. Through trial and error, one of his apprentices learned that a stone was needed to prevent an ash guardian summoned through Conjuration from attacking the caster. The stones can also be used for enchanting purposes. Ildari Sarothril, a different apprentice of Neloth's, was killed during an experiment but was brought back to life when one of these stones was grafted to her. Ildari learned that a stone could be used to prevent necromantic spells from wearing off.
Nirncrux can also be used as a Heartstones. The Dreadhorn Clan, composed of Reachmen and Minotaurs worked Hircine's Bloodroot Forge. Any settlers near the area were either sacrificed or enslaved, and forced to mine Nirncrux to feed the forge. The Reachmen turned themselves into the Blood-Forged. These abominations are comparable to Briarhearts, but their creation involves implanting a nirncrux heartstone instead of a briar heart, resulting in a being that is an amalgamation of blood, nirncrux, and iron.
- For game-specific information, see the Skyrim article.
- Window on the Past quest in ESO
- Events of Dragonborn.
- Talvas Fathryon's dialogue in Dragonborn.
- The Red Year — Melis Ravel
- Neloth's dialogue in Dragonborn.
- Horns of the Reach - Bloodroot Forge Preview on the official ESO website
- Horns of the Reach and Update 15 Preview on the official ESO website
- Filand's dialogue in ESO
- Blood-Forged skin description in ESO
- Rena Hammerhands's dialogue in ESO