When it came to the two skill evolution crystals he stole from the vault of the Underworld Emporium, Corey was torn between what skill he should use a skill evolution crystal on.
The first skill he used a skill evolution crystal on was his talent skill- Record. This was what allowed him to be able to see the stats and information of beings that were a tier above his tier.
He was tempted to try and use a skill evolution crystal on another talent skill like Eyes of Omniscience, and… he fell into that temptation.
However, when he tried to use the skill evolution crystal on his Eyes of Omniscience, the Universal System told him that the Eyes of Omniscience or any other talent skill could not be upgraded anymore using a skill evolution crystal.
After failing to upgrade his Eyes of Omniscience, Corey fell into a deeper dilemma. Choosing a single skill out of the many skills he had was difficult.