The Ethereal Clockwork Heart

Constructed by mysterious artificers in the Mournland, The Ethereal Clockwork Heart is a coveted artifact made of three concentric gold rings spinning and revolving around a ghostly beating heart made of ethereal mist.

Attunement

The Ethereal Clockwork Heart attunes to any solid matter of more than 1 cubic foot it touches for 10 rounds. The artifact sears, burns, and burrows through the host who must make a Constitution Save vs DC 25 or suffer 2d6 necrotic and psychic damage or material damage. Warforged, Clockwork Soul Sorcerers, Chronomancers, and Clerics of Mechanus are immune to the negative effects of attunement. *Non-sentient matter that inadvertently gets attuned rise as Clockwork Constructs made of relevant material (Stone, Metal, Wood, Earth, Ceramic, Glass, Bone, Flesh, Adamantine)

Unattunement requires the death or destruction of the host. Alternatively, a Remove Curse and the forcible extraction of The Ethereal Clockwork Heart may also remove attunement.  The extraction process requires a Death Saving Throw. Survival puts the host at a number of hitpoints equal to one rolled hit die for their class.

Note: Immediately after unattunment, the artifact must be handled, suspended in non-matter or through spells, to avoid its re-attunement to creatures and material.

Hypothesized Purpose

Rumors abound that there once existed the House of Time ruled by the family d'Chron. Together with House of Cannith and Lyrandar they too attempted to harness and bind the elementals from the planes of Mechanus and Temporal Prime to a Khyber matrix but to disastrous results. The entire line of the d'Chron family was wiped from existence. Had the magical experiments been successful, the House of Chron may have been able to rise to influence with the employment of new technologies in the ways of travel and weaponry. Modern scholars and sages have traced The Clockwork Ethereal Heart as the engine powering early Warforged factories.

Major Beneficial Properties

• Dictate initiative order for known participants within a 30ft radius 
• Regain 1d6 hp at the beginning of your turn
• Precise calculations. Advantage on one roll (1/day)

Minor Beneficial Properties

• Immunity to Critical Hits
• Immunity to Exhaustion effects
• Immunity to Time-manipulating effects such as Haste, Slow, and Time Stop
• Immunity to Polymorph

Major Detrimental Properties

• The host cannot sleep and cannot benefit from Long Rest (No ability to regain hitdie, professions die, or professions points normally once spent)
• Other creatures within 30ft cannot sleep and cannot benefit from a Long Rest.
• All other magical items within 30ft loses one charge for the day
• All chaotic creatures within 30ft are aware of the host's presence
• Creatures rolling Natural 1 within 30ft suffer one level of exhaustion

Minor Detrimental Properties

• Hair and eyes become golden and almost metallic in luster.
• Whirring and tocking heart. Stealth disadvantage. DC 30 against being magically silenced.

Destruction

Scholarly sages surmise that The Ethereal Clockwork Heart was created in part by Divine intervention and may only be destroyed while on the Ethereal Plane where it intersects with the Demiplane of Time, The Plane of Mechanus, and the Demiplane of Shadow. At that point it is weak enough to be broken by another artifact, high-level magic or psychic attacks, and/or the celestial powers of deities.

Notes: Immunity: Critical Hits, Immunity: Exhaustion, Stealth Disadvantage: Impose, Bonus: Initiative, any solid matter (special)*, Control, Combat, Cursed