After the rupture of the divine energy in the surroundings, the natural energy gushed out of nowhere. After a while, the divine energy is back however it is faint. It is barely noticeable considering the density of the divine energy, previously.
If Allen is not a Divine Spirit, he might not notice it momentarily. In fact, the other creature of this realm did not notice it.
Well, they would notice it but they first needed to get used to the faith divine energy.
Allen noticed it as he was hopelessly trying to outrun Fenrir's descendant.
With that discovery, Allen released Eyes of the Spirit and let them fly away from the two rampaging creatures.
With the Eyes of the Spirit, Allen gained a new set of visuals. He could observe the two creatures' every motion.
Meanwhile, Allen, as he continued flying, he continued to release more Eyes of the Spirit.