The skeleton realized that to increase its cultivation, it would a lot of corpse qi. It now had twelve units of corpse Qi just like before but this time, it could not upgrade the unknown technique with this quantity of qi. The skeleton now had a decision to make It could either upgrade the Life Sense skill or the Decomposition skill. It felt that the Qi would not be enough to upgrade both of them. The Life Sense skill enabled it to detect living beings in its surroundings, with this skill, it could even gauge the cultivation of its prey. This skill had been very useful in avoiding humans when the need arose.
On the other hand, the Decomposition skill allowed the skeleton to quickly turn its prey into corpse qi.
The skeleton did not panic. It first put this decision aside and began reading through the books it had obtained from its plunder. It went through the books one by one.