343 Spiritual Essence.

"Are you certain that you want to do this, young man?"

Ozul stopped in his tracks and turned his face towards the Elder, "Do what?"

"Don't put your luck on the line. The world outside is cruel, and if you don't have enough strength or a solid foundation to begin with, you'll be crushed mercilessly!" "While we can guarantee not to hurt you while aiding you in absorbing the Mana Core, I cannot say the same for others," the Elder strained his eyes, probing Ozul.

Though he wasn't the only one. Ozul also found his persuasion a little suspicious despite the repeated offer of refusal. 

Turning back, he walked through the door, "I will take my chances."

Not to mention the fact that he lacked a Mana Core to begin with; even if he did, he would still think twice before considering their offer.