Getting back to Zhen's place, only Mizuneko worked on the Mana Gems as he finished working on the Dark Gem's design.
He created a simple gem for Little Phoenix to use. It wasn't ready and could store less mana, and its recharge was very slow and had a chance to be destroyed if overused, but it was still helpful for training.
The Ice Element Mana Gem's design was a little more complicated than Zhen expected as he hadn't ever worked on any of the unique mana that was a combination of other mana.
He had worked with Water and Air, so he had to combine them by creating a new design with parts of both designs.
Little Phoenix, other than working on her Mana Tree, examined the design for the Dark Mana Gems Zhen had drawn on a piece of paper.
Since she learned Zhen's skills, she would have a chance to replicate this design and create one herself.
"Do you need some help on that?"[Shingi]
You can join my discord server. Link in the synopsis of the novel