After discovering that Leon could control the mana, which wasn't his, inside the Mana Shield, he was one step closer to nullify the mana within a specific place. The problem was, the mana within the poison mist still could be felt, and Leon couldn't make the Mana Shield thinner to make it untraceable. He also needed to make his own mana untraceable, but that problem would solve itself once Leon finds a way to get rid of the mana within the poison mist.
"Let's see… shall I use Mana-Eater?"
Although the poison mist inside Mana Shield had become a dense, small sphere of poison that had the size of a marble, Leon still managed to absorb its mana. However, that itself didn't solve the problem. If he could use Mana-Eater to eat every single bit of mana inside the Mana Shield every moment, perhaps that could work… but he couldn't.
"This is so incredibly annoying…"