That detail was important to Rowan and finalized his decision. He realized the ways his enemies stayed ahead of him was by subterfuge and deception, if he does not know the true scale of their powers he would not be able to give a suitable response.
The same goes for his enemies as well, the less information they knew about him, the more pieces he would have to play with.
It was all the same to him in the end though, he would have to kill Erohim. Details about his second bloodline, his Angels, his rapid upgrades and his powers could have been laid bare before this fallen god, and even the ranting of Erohim may be part of a deeper disguise, and Rowan would never easily believe the words of beings that were thousands of years old, being duplicitous was something easily learnt at that age.
Even if the god did not understand what he had witnessed and mistook Rowan for someone or something else, it did not matter, with the wisdom and age of the gods, in due time, he would be able to piece together the pieces of evidence on hand, and understand the scope of Rowans ability.
So he set up his plans to kill a god!
Rowan had several problems to solve in order to even fathom killing a god, as this was a far monumental achievement than he had ever attempted before. He had unique tools and information that should make it possible, he just needed to make them work in a manner he needed.
Off course, Erohim was placed in a very unique situation where his Divine Kingdom was merged with the planet, and therefore it made him very vulnerable to Rowan's Ouroboros Serpent poison. It would be difficult for him to find another god that bears this unique weakness of Erohim.
They could easily kill the world consciousness and in that way they could kill Erohim, but that was the brute force route that he would take as the last option because doing that would yield him benefit, but he was also going to lose numerous tangible resources that could only be gotten from a god.
As he had the assurance of being able to kill Erohim if all the chips were laid down at the table, he began his plan to acquire as much as he could from the planet that would ensure his quick rise to power, he was not greedy, but totally pragmatic, he was in intense danger that was bearing down on him and this risk was acceptable.
The benefit he would gain was also more acceptable, for even if his Ouroboros Bloodline's Absolute body was stuck at the Rift State without seeding thirty-three planets, it did not mean he could not continue upgrading his second bloodline.
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