Noah did not intend to kill his new wife by having her face a threat way out of her league. Out of his, too, but not as much as for Ariel. No, he had a plan.
The biggest problem with the subjugation of large monsters like the Leviathan was not the power contained in them or their magical prowess. Put simply, it was physics.
Humans attacked with weapons like swords, spears, axes, and the like. These weapons were made by humans to kill human-sized entities. Sure, they could kill larger creatures, but 'larger' had an upper limit of a beast like a wyrm; that was the height of a few buildings combined. Not monsters half a kilometre long. Even a ridiculously powerful sword strike was quite useless if it penetrated the equivalent of a mosquito bite.
However, this size difference was simultaneously the greatest advantage humans had over monsters, where humans were the size of flies to the Leviathan. Even if humans found attacking to be difficult, the leviathan felt the same, and its powerful and stupendously heavy attacks were often slow enough to dodge even for Lord-ranked warriors, even if only by a narrow margin.
This narrow margin was all Noah needed. Over the course of a full week, which was the time Noah and Ariel took to find the Leviathan, Noah had used his Arachne form to weave and reinforce a magic rope kilometres upon kilometres long, nearing the strength of even strings made of mithril, even probably being able to lift up entire palaces' weight.
"Now!"
On Noah's cue he had shouted over the roar of the storm, Ariel powerfully leaped off the boat with an end of the rope in hand, pushing it back a few metres and propelling her past the right side of the leviathan's neck, then started falling past the left side of the great beast's neck.
Right as she crossed the apex of her jump, however, the leviathan noticed the rope, which looked awfully thin from its perspective, and brought its tail below the rope to push it away.
At least it tried to before its tail was suddenly pulled back by a strange force. Noah the wyvern held the other end of the rope in its mouth and had wrapped the other end of the rope around the beast's tail just moments after Ariel had jumped.
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The next moment, the attack Noah had been waiting for happened. There was a reason the leviathan was worshipped as a local deity out of fear by the locals.
Leviathan - Sea Control!
Ariel, who had now laid the rope over the Leviathan's neck, was now falling towards the ocean below her and the waves that were churning about in a chaotic frenzy amidst the storm. Her expression was one of focus rather than fear, however.
This was because Noah had discussed what would happen the moment she heard the sounds of the furious rain mysteriously begin to soften for some reason during the fight.
Her expectations were answered as a wyvern beak swooped towards her falling figure and grabbed her outstretched arm firmly, yet not with enough strength to hurt a warrior of her calibre.
Noah immediately took to the skies after throwing Ariel over his back, such that she now rode the back of his wyvern form. He travelled under the left where Ariel had been falling and went upwards past the right of its neck, such that the rope she was holding now made a complete loop around its neck.
Speed was of utmost importance. He hadn't even been able to spot the threat he was so wary of, but as he had warned Ariel, the dwindling sound of the rage of the strom only indicated a wind-up for its next attack.
Noah flapped his wings harder, the rope both of them holding the end of trailing behind them. He knew he would make it, but the threat coming in on them was one that demanded a margin of safety.
'It's getting harder to fly up. This'll have to do.'
Smoothening his almost vertical climb, Noah waited for the event he had waited for to occur.
Almost immediately after he did so, for a few moments, silence dominated the space. No rain, no wind, nothing. Peace.
And then it happened. Now that they were above it, both Noah and Ariel had a clear view of it.
Two megatsunamis clashed, like two godly hands clapping to get rid of two pests, with the sound of a massive crash. The massive walls of water symbolised the rage of the ruler of this domain towards the mere flies that dared to oppose it. The waves would drown out all rain from the region where they were about to clash due to the movement of air around the waves, and a large region around the waves would experience the same thing a few moments before the clash as well. This one casual manoeuvre reinforced the godlike image of the being Noah and Ariel were trying to crush.
The sight of pure dominance in its territory, which would force anyone else to their knees in fear, only created four gleams of excitement in the eyes of two people. Rather, one wyvern and one person who were currently plummeting towards the beast.
Noah the wyvern flicked its back, and Ariel jumped off at the same time. During their time in Noah's horizontal flight, where they had waited for the megatsunamis to clash, they had not just been dilly-dallying about. They had tied the two ends both of them had with them together, and now the leviathan could no longer fully extend itself.
Ariel's job was done. As she landed on the surface of the sea at a safe distance of a few hundred metres from its ruler, the sea became calm enough to run on, and she did precisely that. The boat they had initially been in had been reduced to splinters, as expected, and she would head to the other boat they had set up beforehand. It was now Noah alone, up against the Leviathan.
'Let's play, big boy, Just you and me.'