Weapon Name:

"Dragon Might Blazing the Skies: Ultimate!"

Weapon Description:

A peerless genius born of hardship, her fate took a turn when she encountered destiny's secret path. Adopted as the only daughter of a top-tier scientist, she became fast friends with the leader of Anti-Entropy and was personally trained by the God of Earth.

To repay those who recognized her worth, she took on a divine mission—fighting alongside the strongest Valkyrie's disciple, soaring beyond the heavens, and forging bonds with allies from distant stars.

But just as Mars plunged into chaos and shadow disasters ran rampant, while everyone else stood stunned, she simply smiled—

"Well then, guess it’s my turn!"

—"Uh, Coralie, what are you writing? We have a mission to run."

"Don't you think my Dragon Hammer deserves an epic intro? Let's go, time to fight!"

"Wait—ah! I forgot my hammer!"

A demon king-level genius arrives on an alien world, determined to protect universal peace—only to fall victim to one of Mars’ prankster masterminds, her consciousness cast into a place of stillness. There, she finds a divine-tier baby dragon!

Thus begins the journey of girl and dragon—exploring ancient realms, braving trials, defeating mighty foes. Their deeds draw the attention of the dragonkin, who bestow upon her lost immortal techniques.

When divine punishment descends, the demon king sacrifices herself to turn the tide—scorching the skies, boiling the seas, and with unstoppable dragon might, she forges a legend of immortality!

—"Did you remember your weapon this time, oh great demon king?"

"Roar roar! I’ve achieved harmony between hammer and dragon—the claws and wings now perfectly replace my hammer for both combat and flight!"

"So basically, you forgot your hammer. Again."

(Thanks to u/wasdlurker, just copy-pasted from his ult animation post’s comment!)