Bident

"Snap out of it Yuki," Yuki told himself.

"What can I do to defeat him?" Yuki asked himself as he tried to think of any possible way to win against an enemy he couldn't see.

"Why do you continue to change the subject? There's no need to rush, let's talk things out here then we can deal with the fighting later," said Hades as he removed his Cap of Invisibility. 

"You see, there's no need to be wary of me," Hades said as he began to become visible to Yuki. 

Hades was a tall bearded man-standing at around 12 feet tall with a muscular build. He wore a white toga as he carried his bident which was a two-pronged implement resembling a pitchfork in his right hand. Hades carried his Cap of Invisibility in his left hand as he began to walk towards the enormous throne which was specially constructed from him. 

"You can see me now so there's no point in coming up with a strategy to defeat me while I'm invisible," said Hades.