As Ren's hand made contact with the back wall of the vault, Ren suddenly felt an immense energy surround him.
Feeling the energy enter his body, Ren immediately controlled the pitch-black substance in his body to make a barrier to prevent the unknown substance from moving forward.
Limited to Ren's hand, the unknown substance rapidly swirled around, causing Ren's right hand to start shaking rapidly.
However, as Ren gazed at his trembling hand, he suddenly noticed something.,
"I-it's shining blue?"
Indeed, his entire right hand was shining an ocean blue.
Immediately, Ren sighed before de-manifesting the barrier and allowing the mana to enter his body and flow around.
Within a few seconds, all the mana that Ren had used to sneak into the vault and more was recovered.
Normally, this process of recovering maximum mana would take up to three days, but Ren had just done it in a minute.
