"Okay," Layla immediately did what she was told. She took out the earth-brown core and handed it to Muku, who grabbed it without opening his eyes.
The purple core hand long turned into dust after being sucked dry. The moment he grabbed the earth's-brown core. It's energy started to visibly get sucked into Muku's body. Oddly enough, none of it was getting wasted. Which should have only been possible if Muku had the earth element. Which he didn't. So the correct guess would be that it was linked to the dragon in some way.
"Freya, can you ask Iris if she knows what's going on?" Audrey spoke to Freya
While she had been quick to act and Muku's body was already recovering because of it. It wasn't because she was informed of what was going on. She was just able to quickly realise that he was going through an energy deficiency from a past experience.