Being determined to help the woman in the glass coffin and knowing that she is likely the Water Spirit, as well as a better understanding of everything she can represent, Lucien doesn't want to waste another second before going to her.
"Can we use this portal??" He asks the Sins.
"Yes." Lust quickly responds before pointing to the black roots. "You can absorb that dark mana, although I don't recommend it because your dark affinity isn't that powerful yet, or you can just destroy it like Nea was about to do."
Lucien looks at Nea, and she nods at him; then, he summons his golden naginata, and Its light leaves both the Mermaids impressed. Then he just brings the naginata's blade closer to the dark roots, and Its powerful energy burns the dark mana quickly.
"Let's go!" He comments before entering the Mermaid Fortress again and heading to the portal room.