Based on the item's description, Lein understood that even a small difference could change the outcome of a battle—especially if the advantage was significant, such as having a more favorable element than the opponent.
The Divine Promotion Elixir would only be useful below the Emperor level. Beyond that, it would serve no purpose for Lein.
On the other hand, the elemental scroll would provide long-term abilities and exponential benefits aligned with his growing power.
"The (Immortal Star Crystal) isn't worth considering," Lein muttered, looking at the star crystal. Among the three, it was the weakest—only effective at the Master level and useless beyond that.
Even if he could copy 100 million skills from Master-level enemies, it would be worthless at the Emperor level.
Since the crystal was limited to the Master level, Lein decided not to prioritize it for duplication.