"Eternal Promise"

"Leonna's Legend part 3"

Recap: They celebrated holded a festival and the human king Bestowed Leonna fafnir the official title Princess of Swords Leonna was delighted to receive such a noble title from the king, after that she disappeared without trace but legends has it she was affected by the demon's miasma and decided to seal her self in the deepest part of Creepy Cave" said Leon as he ends the story.
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(Hmm....seems the dark miasma is the very cause for Lumia-chan the goddess of life's source of  worry since it lowers the human population rather quick, I'd say it's about 40% every each time they fought the demons the humans which dies or get turned into a demon, well I better solve this problem first before handling the rescue of the Sword Princess problem) Rido thought as he carefully analyze the story

"Seems like telling this story is quite helpful to my current problems" said Rido with a tone of appreciation in his sentence
"Oh is that so?, I'm glad I'm able to help Rido-san" said Leon Happily (hmm... I still need to know a way to counter the dark miasma that turns humans into demon and turn them back to normal to save Leonna if the legend is true that she was affected by the dark miasma...Oh Right!! I do have a way or rather I have the Power) Rido thought revealing a surprised face

"Hey is it possible to counter the dark miasma with Dark Arts/Magic?" Rido asked as he looked to everyone "Y-You can Perform or rather do Dark Magic?!" Said Tsugami astonished to Rido's Talent for Magic.

(As far as I know the Demon Race has a low rate of being born as a magic user and only among the 7 Deadly sins are the only demons who could use magic however Rido can use Magic to top it all off he can use the Forbidden Element which is Dark Magic even I haven't heard anyone being able to use this not even the 7DS) Tsugami thought as he couldn't believe Rido's Talent for Magic

"Hmm? Is something wrong being able to use Dark Magic? Is it perhaps in this world the demon race has a low rate of being a Magic user?" Rido said while making a curious face
"W-Well you see, Dark Magic is an Ancient Magic which is incomplete and has been forbidden ever since" Explained Eleonor like a know it all.

"I see, if that's the case then I'll keep in mind not to use Dark Magic in front of everyone unless its a emergency of some sort" Said Rido as he carefully listens to Eleonor's Explanation
"A-Anyways, I believe it is possible if You can use a Dark absorption spell then I guarantee it will work" said Tsugami Confidentially

"Well if that's all then I can do it" Said Rido Nonchalantly
"What?!" Said everyone with a surprised faces
"R-Rido-san Absorption Spell is a High level S class Magic spell that requires 500 mana for it to be activated" Explained Pella as she couldn't believe Rido's words a little, "We know you mean well but that's taking it too far even for a joke anyways how many is your mana points?" Said Ronaldo as he quickly change it into a question.

"I'm telling the truth by the way my mana is only 6778 here check out my Status Card" said Rido as if he doesn't care about a thing.

As Rido Showed his Status card to them, They were speechless at Rido's unbelievable Records they quickly apologized for doubting his Words, Rido was flattered since they respect and reflect to their actions even to a demon like him.

"Well since we now know how to counter attack the dark Miasma lets go back to Creepy Cave and Unseal Leonna fafnir to save her!" Said Leon filled with inspiration,
"Hey isn't that suppose to be my line?" Rido asked while trying to break the fourth wall unfortunately it's hard as a brick

"Shut up you!" Rido shouted up in the sky like a lunatic

Continue :3