The Dragonbone Spirit was sealed at the base of a low mountain.
Hikari Uchiha first activated the Blood Coral Jewel, conjuring a barrier that enveloped a several-hundred-meter radius. Then, she summoned the fourth stage of her Susanoo before nodding to Kikyo. The shrine maiden loosed an arrow, breaking the seal on the Dragonbone Spirit.
As a surge of demonic energy erupted, the ancient great demon, dormant for centuries, awoke.
What followed was an earth-shaking battle!
Demonic energy churned, sending countless rocks flying like a storm of stone rain. The Dragonbone Spirit unleashed energy blasts from its mouth that made even the sturdy Blood Coral barrier tremble—comparable to a Tailed Beast Bomb from the Naruto world.
Though, to be fair, it wasn't on the level of the Eight or Nine Tails' bombs—more like something from the lower Tailed Beasts.
Bulma and the others, who'd been stationed outside the barrier, hopped into their plane mid-battle and fled a dozen miles away, watching the chaos through binoculars.
To be honest, the Dragonbone Spirit was stronger than demons like Naraku or Daiyokumaro. It was, without a doubt, the toughest opponent Hikari had faced in the Inuyasha world!
Without the protagonist's plot armor or something like Inuyasha's "Wind Scar" to counter its regeneration, things got tricky. (Amaterasu could've worked, but Hikari wanted its scales and claws for gear, so she needed its hide intact—no burning allowed.)
It took a ton of effort. Kikyo nearly drained her spiritual power, and Hikari had to pop a Senzu Bean to restore her chakra. Only then did they manage to overpower the raging Dragonbone Spirit through sheer brute force.
"Damn humans, daring to challenge me…" Even with its body severed in two, the pale human face on the Dragonbone Spirit's head kept yapping. "If I were at my peak, you'd never have beaten me! Even King Toga…"
"You lost, dude. Quit talking," Hikari interrupted. Towering in her forty-meter Susanoo, she raised its dark red greatsword and drove it through the demon's heart.
A fountain of blood gushed out, staining half her Susanoo crimson.
Hikari followed up with several heavy slashes, hacking the Dragonbone Spirit into four or five pieces, making sure to sever its cervical spine. Finally, it stopped struggling, choking on its own blood until it went silent.
Just to be safe, Hikari waited a bit to confirm it was truly dead before descending from the sky. She pulled out a scroll and began sealing the demon's body parts separately.
"By the way… this thing's a 'dragon,' right? Wonder how it'd stack up in Eri's Dragon Clan world," she mused. "A Next-Gen Dragon? Or more like that dimwit Fenrir?"
Too bad she wasn't confident using Yasaka Magatama to control a centuries-old great demon's mind. It would've made a pretty cool mount.
A dragon knight, though? That's the dream!
Hikari sighed, imagining the scene, a little bummed.
Oh well. There were plenty of dragons in the Dragon Clan world. If she really wanted to, she could probably ride one someday…
While Hikari and Kikyo dealt with the Dragonbone Spirit's corpse, Bulma and Kohaku flew back in the plane. The battle had reshaped the surrounding mountains, and the storm of demonic energy had carried for dozens of miles, drawing Inuyasha's crew, who'd been heading elsewhere, to the scene.
Two uninvited guests also showed up: Sesshomaru and Totosai.
At this point in the timeline, Sesshomaru was still obsessed with claiming Tessaiga, so the moment he saw Inuyasha, their usual love-hate sibling brawl kicked off.
Hikari, meanwhile, flagged down Totosai with a request to forge a weapon.
As the Inuyasha world's greatest swordsmith and an old friend of the Great Dog Demon, Totosai was a quirky old man. In the original story, plenty of demons—even Sesshomaru—got turned down when they asked him to forge blades, forcing them to settle for his apprentice, Kaijinbo.
But Totosai was pretty friendly toward humans.
Maybe that's why Hikari's request went through so smoothly.
"Didn't expect two humans to take down the Dragonbone Spirit," Totosai said, inspecting the demon's remains. "The materials are in good shape. Come back in half a month."
"Thanks for the trouble, old man," Hikari replied. Then, after a moment's thought, she added, "Oh, and after you're done with the sword, could you use the leftover scales to make a few sets of armor? Simple inner armor's fine too. I'll make sure the payment's worth your while."
"Armor, huh? Sure, but I'll need the measurements of whoever's wearing them."
"No problem."
Besides herself, Hikari planned to get sets for Bulma, Eri, Kikyo, and a few others. If there was extra material, she'd make some spare sets in different sizes to gift to people she liked—Naruto, the younger Uchihas, or maybe future group chat buddies.
With Totosai taking the Dragonbone Spirit's corpse, Hikari checked one goal off her list.
Her other goal?
"…So this is 'spiritual power'? Feels kinda like telekinesis," Hikari said, standing in the forest. She held out her right hand, and a small pebble floated above her pale palm.
"Exactly," Kikyo confirmed, nodding. "With the strength of your soul, Miss Hikari, your spiritual power reserves are far greater than this. But if we drew it all out at once, your body might not handle it, and your soul could separate from it. You'll need to acclimate gradually before pushing further.
I'll put together a guide on training spiritual power and upload it to the group chat. You and Bulma can follow it based on your own situations."
"Got it," Hikari said, glancing at her reflection in a nearby stream to check her Sharingan. No new changes yet.
Probably had to wait for the "purification" to finish.
"Hey, Miss Kikyo, that 'Purifying Light' of yours—can you teach it to others?" Hikari asked suddenly.
Kikyo hesitated before answering. "…It's possible, but I can't guarantee you'll be able to learn it."
According to Kikyo, Purifying Light was an advanced spiritual technique that demanded more from one's purity of heart than their spiritual power. Basically, only someone with a heart as pure as a saint could master it—think "worthy of riding the Golden Nimbus" levels of purity.
Hikari was just curious, though. She didn't really need the skill. When it came to purging malice, she preferred a more… physical approach.
(When I run into Orochimaru, I'll ask if he's got any secret techniques to help restore Kikyo's soul, she thought.)
"Well, I'm heading back. Call me if you run into any tough enemies," Hikari said, waving goodbye to Bulma, Kikyo, and Kohaku in the distance.
She exited the Inuyasha world.
When she opened her eyes again, she was back in the familiar surroundings of Konoha.