Sword Art Online: Alicization Episode 8 Link

This episode is pivotal for establishing that in the Underworld, willpower and mental image can override the system's hard numbers and parameters.

The battle is not just about physical technique but introduces the concept of the "Power of Imagination" (Incarnation). Volo utilizes the weight of his family’s ancestral pride to exert a crushing pressure on Kirito. Kirito counters this by drawing on his own memories and the "weight" of the Black Pieced Sword, which he discovers can absorb power from its environment (specifically the sun) to grow in strength.

We see the first real demonstration of Kirito’s new weapon's capabilities, hinting at its origin from the Gigas Cedar. Production Highlights

The duel ends in a stalemate, which earns Kirito respect rather than punishment. Volo is revealed to be a stern but honorable warrior who takes swordsmanship seriously but lacks the malice of other antagonists.