Kumo desu ga, Nani ka?

Synopsis

Nameless and Araba find themselves evenly matched, but she is able to turn the tide in her favor by trapping the earth dragon in a web she prepared beforehand. However, Araba then uses all its saved-up skill points to acquire abilities Nameless is weak against. Finding herself increasingly cornered, Nameless briefly considers giving up but ultimately revolves to fight to the end. Just as Araba is about to finish her off, however, the earth dragon suddenly collapses. It is then revealed Nameless knew she could not win head-on, so she instead used a skill she acquired beforehand to drain Araba's stamina until it succumbed to exhaustion. Victorious, Nameless is about to deliver the killing blow when Araba stops resisting, satisfied with their battle. This angers her and she kills the dragon but is left feeling hollow. In the present, the Demon Lord reminisces about the time she fought an earth dragon while Shun vows to avenge Julius, unaware that Hugo is plotting against him. Back in the past, Nameless finally finds a way out of the labyrinth by following a tracking spell she placed on the humans from earlier.

(Source: Wikipedia)