3 days had passed since Rigel came to Riverwind and farmed Cores. He could tell how potent those Cores were even though they were still young. If he knew about this place, he would have gone here and farm all the Cores to get stronger.
The Cores that the deers dropped were for Vitality and Agility. The reason why it was second most popular, was because of Vitality status which increased stamina and recovery. It was the most important status for Players to survive in the tower.
"You wander quite far..." Esra looked at Rigel who was camping in the forest on the west side of the mountain. "This place barely has any monsters though. Are you getting a lot?" She asked and looked at the monster meat that was being grilled.
Rigel pointed at the log across the fireplace, signaling Ester to sit down there. When Esra sat down, Rigel reached out his hand and pointed his palm down. He dropped dozens of Cores that he had hunted in 3 days.