The first thing William did was to let Charley activate a technique using a light element. The moment he did so, the world down there brightened up, and there William managed to get a glimpse of what was down below.
"Damn! The Gluttonous Berserk? Out of all things, that troublesome dude is down there?!!!"
The moment William took a glimpse of what was down below and he instantly recognised it. It was nothing else but an infamous monster, one which got the ability to madly absorb spirit power and consume it from anything.
There were monsters which could absorb spirit power from living creatures. Be it humans or monsters, they could get their spirit power depleted. And yet this had to follow certain conditions and situations, and mostly would require the monster to harm the target, let him bleed, so it could absorb the spirit power.