Toji's body changed rapidly, he had expected fire, like his 'Spirit of Vengeance' form, or even that demonic aspect of his Devil Transformation, but no, it was nothing like that.
The mythical creature form of a Demon was based on various aspects: race, individual personality, desires, and will.
From beginning to end, Toji was barely influenced by the Abyss Pathway, he used shortcuts to advance time and time again, so Toji had no doubt that he was probably the least 'demon-like' Demon that ever existed.
However, he was a Demon, that was a fact, so he couldn't simply transform into an angel. However, perhaps because he held back throughout the process, the form he took when he transformed into a mythical creature was so strange.
Toji began emitting smoke as his black eyes turned a completely bright red, but this was only the initial stage of his transformation.
His skin began to crack, red lines forming as the transformation progressed. It was his first transformation, and he was taking it slowly. Toji used his newfound mental strength to keep himself from going insane during the process, after all, it was just an incomplete mythical creature form.
His skin quickly began to blacken rapidly, its texture changing to a cold, metallic sheen. Soon, his skin expanded, becoming thicker and harder. The transformation accelerated at this point as Toji let out a roar, though this roar seemed muffled due to his head having transformed into a helmet of armor.
When it was all over, all that remained was a suit of armor that was completely black, with only red light visible from where his eyes should have been.
The armor constantly emitted a shapeless black mist, it became evident that this mist was not part of his appearance, but rather Toji's energy continuously leaking due to his incomplete transformation.
The armor only stayed in place due to the Demons' ability to maintain their mythical creature forms for short periods of time.
Toji observed his new form, the inner madness threatening to consume him. He felt his mental energy being consumed at an accelerated rate, but he also sensed the extreme power this form had given him.
Toji wasn't inside the armor, although his energy was indeed concentrated there, Toji was the armor itself.
He resembled a dark knight at that moment. He approached a mirror and looked at himself. His form reminded him greatly of Lancelot Berserker, he even felt that the power he gained with this form was very similar to Knight of Owner. He had no weapon, but everything that came into contact with him would transform, just like his Spirit of Vengeance version, but much stronger.
The name of the ability was Corrupted Knight. He felt he could corrupt anything he touched, it wasn't just something he was in contact with, but everything he corrupted became corrupted and would obey him. He felt he could even transform a Bijuu into that corrupted state, though he would still have to try it out to find out.
The only problem was that the ability only lasted as long as he maintained that form, and after regressing from that form, everything he corrupted would remain corrupted, but without him as a controller, these things had two possibilities: explode because they couldn't handle his corruption, or transform into cursed beasts or items. The specific effects were too random for an exact definition.
Toji could also simply reabsorb the corruption he emitted before leaving in that form, so it wasn't as if there were no solutions.
Thoughtfully, he picked up Shakukonto and in the next moment, the sword transformed again. It wasn't like a demonized weapon engulfed in flames as in the previous transformation, this time, the sword retained its form, only becoming completely black with red lines glowing along its entire length. Just like his form, it continuously emitted black mist, clearly leaking energy.
The sword's power increased considerably because of this, Toji wouldn't test this thing here. He felt it could cut his castle in half at this point, so he simply retracted the corruption, and Shakukonto returned to normal. Then, sensing that his mental energy was at its limit, he reversed his transformation.
Returning to human form gave him a feeling of weakness and exhaustion, forcing him to regain his composure after returning. Although the form was quite powerful, he thought he could even go toe-to-toe with Madara of the Six Paths in that form, it was difficult to maintain it long enough to decide a fight.
He shook his head, in the end, he still needed to keep moving forward.
Transforming into a full mythical creature form was only one of his abilities, he could also use a partial transformation, in which case his mental energy consumption would be much lighter, but his strength would still not reach the level of a full transformation.
The advancement to Demon greatly strengthened him, but it wasn't over yet, he soon focused on the requirement for the Blatherer advancement ritual.
Toji froze as soon as he saw the requirement, why the hell are the progressions in the Abyss and Chained sequences always so annoying?!
It was possible to say that this was the simplest ritual he had discovered so far, but also the most difficult to perform.
To find a way to sign a life-and-death contract, either time-limited or permanent, with a demigod of a path that possesses purifying properties or represents life.
So he must take the potion during the term of the contract.
Toji remained silent.
He had no way of finding another demigod in this world except for Jugo.
The Chained pathway had nothing to do with purification or life.
So... he was screwed.