Zarkest

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{{DISPLAYTITLE:Zarkest}}{{CelestialElement|name=Zarkest|oed=ZAR-kest|ipa=ˈzɑːr.kɛst|image=~~Zarkest_vial~~.png|element_class=Celestial Element (Stardrive Fuel)|equivalent=Hydrogen|universe=[[Lethurîa]]|family=Fuel Elements|symbol=Zk|state=Gas / plasma (under containment)|density=Extremely low mass; absurd energetic potential|hardness=Not applicable (non-solid)|heat_resistance=Exists comfortably at stellar temperatures when contained|phase_behavior=Perfectly stable until deliberately triggered; collapses into spacetime thrust on reaction|appearance=Pale, luminous vapor or caged plasma; often faintly blue-white|primary_energy=Kinetic / spacetime thrust|energy_density=Astronomical; one molecule can propel a ship to lightspeed|metaphysical_behavior=Couples directly to the fabric of spacetime when ignited|hazards=Misuse can tear spacetime, annihilate vessels, or destabilize orbits|creator=[[First-Flames]]|era=Early Formative Age of Lethurîa|location=Silicate and rock cores of gas giants|concealment=Sealed in high-pressure cores to prevent casual access|uses=Stardrive fuel, relativistic transit systems, experimental warp engines|wielders=First-Flame-era civilizations; extremely restricted modern use|alchemical_role=Ultimate propulsion reagent; forbidden in most alchemical doctrines|image_caption=Contained Zarkest plasma within a reinforced stasis vial.}}

{{DISPLAYTITLE:Zarkest}}{{CelestialElement|name=Zarkest|oed=ZAR-kest|ipa=ˈzɑːr.kɛst|image=ZarkestExhaust.png|element_class=Celestial Element (Stardrive Fuel)|equivalent=Hydrogen|universe=[[Lethurîa]]|family=Fuel Elements|symbol=Zk|state=Gas / plasma (under containment)|density=Extremely low mass; absurd energetic potential|hardness=Not applicable (non-solid)|heat_resistance=Exists comfortably at stellar temperatures when contained|phase_behavior=Perfectly stable until deliberately triggered; collapses into spacetime thrust on reaction|appearance=Pale, luminous vapor or caged plasma; often faintly blue-white|primary_energy=Kinetic / spacetime thrust|energy_density=Astronomical; one molecule can propel a ship to lightspeed|metaphysical_behavior=Couples directly to the fabric of spacetime when ignited|hazards=Misuse can tear spacetime, annihilate vessels, or destabilize orbits|creator=[[First-Flames]]|era=Early Formative Age of Lethurîa|location=Silicate and rock cores of gas giants|concealment=Sealed in high-pressure cores to prevent casual access|uses=Stardrive fuel, relativistic transit systems, experimental warp engines|wielders=First-Flame-era civilizations; extremely restricted modern use|alchemical_role=Ultimate propulsion reagent; forbidden in most alchemical doctrines|image_caption=Contained Zarkest plasma within a reinforced stasis vial.}}

'''Zarkest''' is the most volatile of the Celestial Elements. Comparable to hydrogen in conceptual structure, it contains enough energetic density that a single molecule can propel a starship to lightspeed.