Space Magic
It was almost time to leave the cavern. William didn't plan to use the remaining two thousand Potential Points, leaving them as the emergency fund like usual.
He thought about using some points to upgrade his Space Element before he left, but a quick test showed that Spatial Magic was much more dangerous than William thought. He tried using it to leap forward a few meters, but accidentally sliced off his own head in the process.
On a good note, the head ended up teleporting to the destination William had in mind, he was just missing the rest of his body.
It sent shivers down William's spine to see a headless self, but he surprisingly wasn't dead yet. The S-Rank Regeneration Talent with the help of the Blood Element actually prevented William from dying.