Who is it?

No one understood his opponent better than he did.

The King of Gods furrowed his brows.

However, his adversary was ultimately older than him, used to be him; thus, he might be oblivious of the powers his opponent possesses, yet the Father of Gods was well aware of every tactic he had in hand.

It seemed like he was at a disadvantage from the start, but it wasn't so, for he possessed the most potent and pure strength, already having obtained the Rune, but yet to offer his right eye to Mimir's Spring in exchange for infinite wisdom.

Thus, his expertise in magic and tactics could never surpass that of his older self.

But he had things his opponent lacked; courage, enlightenment...

Of course, what truly mattered were Gungnir in his hand and Sleipnir, the eight-legged Sky Horse, under his crotch.

Old Odin recognized the threat the Eternal Spear posed to him, so he feigned the summoning of the Wild Hunt Legion, dispersing himself amongst them from the beginning.