Transmigrate to Douluo: The Eight Trigrams Sword Immortal

I transmigrated into the world of Douluo and awakened twin martial souls. To my surprise, they were both swords: one was the Xiantian Eight Trigrams Sword, and the other the Houtian Eight Trigrams Sword. The Xiantian sword specializes in killing, while the Houtian sword specializes in transformation. With innate full spirit power, doesn't that make me invincible?!