In the spiritual world.
After drinking the Snake Eye Potion, the brain became instantly clear, and a continuous flow of power surged into the mind.
The forming Ouroboros began to spin, at the same time, light radiated from the eyes of the first Ouroboros, constantly transferring energy to the second one.
This was a synergistic effect; as the number of Ouroboros in Roger's mind gradually increased and connected to each other, they could eventually influence and enhance each other.
That was when the Myriad Snakes Meditation Technique approached its final stage.
The scales on the Ouroboros became clearer, and its eyes grew gradually brighter. During the practice, Roger once again experienced immense pain.
He did not wait for the effects of the potion to fade before he continued with the second dose. His spiritual power surged, and his resistance to the Potion increased significantly.