Chapter 405: Ultimate Element

BOOM!

Another wave of lightning shockwave burst from the Warden of the Sky Core,

The sheer might of the shockwave got blocked by the powerful barrier surrounding Rex, but the air still got out from the barrier as it cracked the room Rex is in.

Even the entire training ground rumbles every time the lightning shockwave exploded.

"Sir Vargas! Someone is upgrading their elements into an Ultimate Element!", Linda shouted from the side in shock, she saw the entire training ground rumbling.

Vargas also frowns as he can sense the lightning mana becomes chaotic,

It's like a powerful burst of blackhole that sucked every lightning mana in the surrounding, the scale of the phenomena is frightening, "There's no other one except for him...", Vargas mumbles.

After reaching the quiet room that Rex is in right now,