S1E11: Basilista, the Venomdrake

Rudd and Elyssia visit the new Abellio Labyrinth in order to defeat the "Miasma Dragon Basilista." As Rudd wields the magic sword he has acquired, he becomes confident in its rigidity, which can withstand even a blow infused with magic essence, and in the hidden power that has been newly discovered. The two were making good progress, but suddenly a tremendous roar echoed through the labyrinth—