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The Rainru is a relic-grade Templar sword—fully usable as a frontline weapon—whose enchantment suite is optimized for containment and boundary-setting rather than ordinary lethality. It is most strongly associated with the Eveny conflicts, where it first enters the record as a “break glass” failsafe during the First Battle of Eveny (Majora). In later eras, it becomes a daily-driver hero-tier blade (notably carried by Kiara Quall after she is cured of infection), after its concealment method is exposed and it is forcibly seized during the Second Battle of Eveny (Flarion).
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Deep-history tradition attributes the Rainru’s creation to Tanuki, forged shortly after his time as a Jethro host—during the epoch when Flarion carries the burden instead (millions of years ago). In this framing, the Rainru is not a prestige weapon but a defensive answer to a specific kind of nightmare: a “never again” failsafe meant to prevent another Jethro–Tanuki-scale disaster from ever getting loose on the universe.
The same tradition describes a Tanuki who emerges diminished, carrying guilt for what Jethro did through them, and refocusing life around two commitments:
rebuilding a force for good—raising the Amber Krowen and recruiting trustworthy Templar-gifted into the Tanukian line where they can be guided and relied upon, and
staying planetbound on Amber Krowe—a vow to never again leave the surface, so the Red Matter cannot be left exposed.
In that arc, Tanuki completes a matched pair of blades: