"Oi. Are you serious about this?" Fenrir asked with a serious expression.
"Yeah." Nathan nodded, his hand holding a lot of cores. "Anubis, Fenrir. Make sure to pay attention to my state."
"Tsk." Fenrir clicked his tongue, feeling annoyed.
Nathan grinned and started putting all those cores in his mouth, swallowing them in one go.
As usual, the cores melted with his mouth's heat, as the surge of Ena rushed into his body.
"Kh!" Nathan gritted his teeth. His body instantly heated up. However, the heat was still less than when he swallowed the mature class core, so he still grabbed another batch of cores and swallowed them.
His body was processing all that Ena quickly. It felt like he was catching a severe fever. Fortunately, the pain wasn't there yet. Hence, he didn't hesitate to swallow more cores.
"Kh!" As the pain started to appear, Nathan slowed down. He had to endure it and get as much as Ena possible.