As Ozul disappeared from the alley, he didn't notice the unusual disturbance of Spiritual Essence in the atmosphere.
But even if he did, he wouldn't have figured out that someone was keeping watch over the area. There was a curious eye, which despite him trying to hide his peculiarity, was able to notice something special in him.
Unaware of this fact, Ozul sped towards the forest to find a secluded area. If it was anything like consuming a Mana Core, he would cause quite a commotion if he tried to absorb the Spiritual Core inside the city.
Using The Purity could help contain it but he didn't want to risk it now.
...
Soon he found a place with no disturbances in the Spiritual Essence. It meant that there wasn't anything living in the area except for the trees.
On his way here, he had already washed off the blood from the Core as he had created quite a mess while taking it out from that woman's body.