Hárbarth has finally been defeated—though at the cost of Rífa’s life. Yuuto, now faced with the imminent destruction of Yggdrasil, has no time to mourn and must move forward with his plans to save the continent’s people. As the new þjóðann, he has issued a decree mandating that all patriarchs fall under his banner. However, Oda Nobunaga, patriarch of the powerful Flame Clan, defiantly continues his march upon the Holy Capital... The epic battle between the two summoned patriarchs is about to begin! Can Yuuto’s cheat abilities defeat the legendary warlord of old? The final showdown between the two mighty leaders begins in this 15th volume!

Having defeated the Anti-Steel Clan Alliance Army and freed Rífa from the clutches of Hárbarth, Yuuto immediately advances upon the Holy Capital of Glaðsheimr without regard for his army’s fatigue. For Yuuto, who has foreseen the complete destruction of Yggdrasil, marrying Rífa and gaining the title of þjóðann are things he must do at any cost. However, awaiting him there is a man who has not yet given up on his long-held ambitions. How will it all end? Find out in this shocking 14th volume of the ever-popular isekai fantasy series!

Strategy versus power: The showdown with Steinþórr and the Lightning Clan approaches! Yuuto has finally come clean with Linnea about why he can’t marry her. But just as it seems they’ve reached an understanding, troubling new information arrives: The Lightning Clan is preparing to launch an invasion! Steinþórr’s army is fierce, and the man himself possesses monstrous inhuman strength. Yuuto has reliable allies like Sigrún and Skáviðr, and he has his “cheats” — tactics and technology he copied from future history. But will that be enough for the Wolf Clan to prevail against a foe said to be invincible?

Yuuto's new Nordic life isn't the Hygge-filled heaven he may have hoped for. The Wolf Clan face continued challenges from outside, and a tenuous grasp on control by the benevolent, ageing patriarch within. As past memories resurface, Yuuto finds that conquering the discomforts of his modern upbringing could be the source of salvation for everyone involved - but can he turn that information into iron before the next battle begins?

Yuuto gets married?! And at last, the veil is lifted from the mystery of Yggdrasil!! Time flows onward in Yggdrasil, and it is the height of summer. When Yuuto returns victoriously to his capital city of Gimlé, he is greeted by the fervent cheers of his citizens and the smile of his beloved Mitsuki. With the Panther Clan defeated, there is a brief time of peace, but no shortage of issues: How will Linnea fare against the rising food supply problems? What is the cause of Mitsuki’s spate of poor health? Elsewhere, the patriarchs of the Flame Clan and the Lightning Clan meet in a fearsome clash!! The world itself reaches a key turning point in this 10th volume.

Some urban legends are best left untested! Yuuto Suoh gets more than he bargained for when he joins his childhood friend Mitsuki Shimoya in testing out an urban legend. When he uses his phone to take a picture of himself with the local shrine's divine mirror, he is whisked off into another world -- one heavily steeped in the lore of the old Norse myths. Using his knowledge gained from school and from his solar-powered smartphone, he has the chance to bring the Wolf Clan, the same people who cared for him, to prominence, all while earning the adoration of a group of magic-wielding warrior maidens known as the Einherjar.

Cheat versus cheat!! A showdown between Yuuto and his sworn brother! As Yuuto continues to introduce reforms for the sake of the Wolf Clan’s future, he finally begins in earnest his search for a way back to Mitsuki in the modern era. When he visits a hot springs for a bit of rest and relaxation, Jörgen launches “Operation: Make Him Stay With a Honey Trap!” Yuuto is momentarily shaken, but maintains his firm resolve. But then the nomadic Panther Clan chooses that time to invade his clan’s sister nation, the Horn Clan. And leading the Panther Clan is the man who fled the Wolf Clan one year earlier: Yuuto's sworn older brother, Loptr! Will the conflicted Yuuto be able to raise an army against his family?!

The intense clash for the capital grows ever fiercer! Now that Nobunaga is hell-bent on avenging his most loyal retainer, will Yuuto be able to stay one step ahead of the general? The dangerous dance continues between the two patriarchs, and in the heat of it all, a rather unexpected fighter awakens to their true potential... The battle for Glaðsheimr—and all Yggdrasil—nears its climax. Who will be left standing when it’s over?

Rumblings of rebellion against the Steel Clan in the New World?! The tyrant reginarch who denied his subjects the convenience of modern culture and sowed seeds of oppression across the land meets his end at last…while elsewhere, Suoh Yuuto enjoys his newfound freedom. Now trying his hand in the world of commerce, he and his family set off on a new adventure through Cyprus and other lands to reach his final destination. The Master of Ragnarok concludes here, completing the circle of fate at last!

Enough is enough! Yuuto knows drastic actions are necessary to save the Wolf Clan from destruction - but can he convert enough people to his side in time?