Endbringers

It's roar only gets louder as time goes on. Buildings near him begin to crack and collapse, though at several metrus away Nikan is likely only being deafened.

Nikan finds that he does not become the entity directly, but becomes a strange... node? Core? 
Matter begins forming around him at a decent pace, working to fabricate a body akin to Behemoth's.

Behemoth snaps his head towards Nikan, and takes a step towards him. Several buildings collapse in the resulting shockwave.
He brings his arms all the way back, and them slams them forward in a clapping motion.
A second later, Nikan is impacted by an immense blast of kinetic force, cracking the impossibly dense flesh around him.
Behemoth gets ready for another clap.

Binary's trying to choose between fighting the beast or abandoning the planet and starting anew.

Fight! Fight! Fight! Fight! Fight!

"Who dares..." a massive figure emerges from the shadows, his form a black, blank silhouette against the shroud of darkness. Only his eyes were visible, twin, bloodred holes on his face. His voice a growl, Zurakia adds, "to try and steal MY conquest from me?"

Finally, he emerges fully from the shadows, his muddy-orange armor radiating with power, "This world will fall by my hand, and my hand alone."

Crackling with energy, his metal hand slams shut into a giant fist. Now a gutteral shout, he adds loudly, "And there is room for no more conquerers here!"

Engulfed in fire, he charges the best head-on, undeterred by it's size. Glowing even stronger, in a way never before seen, his fist stretches out behind him, tense and ready to strike.

The Behemoth's eye flits from Nikan to the great being, and settles on him.
Zurakia finds his energy rebelling against his control, turning destructively against him and itself. The effect grows vastly stronger as he approaches.

Behomoth's control is fairly powerful, but the aura may defend Zurakia, yes.
     It does not, however, defend Behemoth, and that is the downfall of Zurakia's attack. Behemoth lets himself be struck, but before the kinetic energy makes it past the second or third layer of his body it is already being redirected. The ground explodes like glass beneath them, and immediately afterwards Nikan feels himself pummeled by a strong, constant, crushing impact.
     But Behemoth? He stands unmoved, with only a slowly growing indentation in his ankle.

His armor is pulverized by the impact intended for something with exponentially more mass, but otherwise he seems fine. Behemoth is ignoring him now in favor of Zurakia.