C640 Their Trump Cards

Gu Mingfeng wielded a low-grade, seventh-rank spiritual artifact, renowned for its incredible hardness. Yet, despite his all-out sword strike, he couldn't inflict the slightest damage on the bone dragon's skeleton.

Shocked, he quickly retreated.

But the bone dragon's tail was already sweeping toward him with alarming speed and agility. In the cramped quarters, Gu Mingfeng had no room to evade