C536 Outside the Secret Realm
The Transmission Tablet and the Heavenly Book of Killers were both Spiritual Tool with special abilities, and their grades were at the Moon Tier or even the Sun Tier.
To Su Ze, the secret techniques and inheritances recorded on the red stone slab were all in his possession. Naturally, he didn't need to kill to obtain the recognition of the 'Heavenly Book of Slaughter'