The mechanism to enter the third floor wasn't complicated, just very cleverly hidden. It was meant to be easily accessible for those who were meant to be there while still keeping intruders away effectively.
Atlas could see through the walls. This wasn't an entirely new ability, but it was definitely something that never worked as efficiently as it did in this ruin.
Was it because he suddenly had an increase in strength?
Such a thing didn't exist in this world. Atlas' best guess was that it was a combination of things.
Firstly, [Intrinsic Foresight]. It allowed him to understand and comprehend things at a rate others couldn't. It allowed him to see the world in slow motion and understand it at a deeper level. It gave him detection abilities and eyesight beyond his level, and most importantly, when it synergized with the energy of the Formation Spark, a magical thing happened.
