Layer 0!
It was a Hexadecagon situated in the centre of the Attributed Region, spanning a length of 16 kilometres from the gate to the Major Treasure of Attribute in the centre.
Unlike the previous Layers which were filled with water splashes from a variety of effects, Layer 0 was peaceful. There were no traps here. One didn't need to follow any rule or travel path to obtain the Attribute.
The sole treasure available in this place was the Major Treasure of Attribute. It was just lying there, peacefully, not protected by any Attributed Creature.
The ten Layers until now were the test. If one made their way to Layer 0, they were eligible to obtain the Major Treasure of Attribute. Hence, there were no obstacles in Inala's path.
All he would have to do is walk to the shining brain and touch it, which would cause it to fuse with him, giving him the power of the Major Treasure of Attribute.