A Water Guardian

*Crack* 

Over and over, the dungeon boss, rammed at the Ice sphere john had formed. The outside couldn't be seen as it was a dark ice sphere so they didn't know what was attacking them 

"John, did you see it?" Serena asked 

"No... I only saw it's outline thanks to deprehendre." John replied 

"Me too..." Said Ariel 

[She has a wind version of deprehendre... It works underwater?] 

*Crack* 

"Then, if we can't see it without magic, that means it's using something to coumaflage itself... Right?" John asked 

"Not exactly." 

"Then what is it, Master?" 

"It's a elemental guardian bound to a water filled location." 

*Crack* 

"So it's one with the water?" 

"In a way."