This was exactly the kind of situation he had anticipated. He had suspected from the beginning that the system wouldn't easily grant such powerful effects, whether obtaining new talents or enhancing existing ones.
The more Lein thought about it, the calmer his expression became. He would always take a deep breath whenever the thought crossed his mind again. He rationalized this situation, understanding it better because he possessed a massive number of Talent Crystals. He didn't value them as highly as others might.
If he had given just one Talent Crystal to the Guardians earlier, they might have fought to the death, risking their lives for that single crystal.
How difficult was it to obtain a Talent Crystal? Extremely difficult, of course. "I needed to achieve an SSS rank evaluation just to get one," Lein said with pride.