Yang Genshuo originally thought the same as Yang Shi, to use extreme firepower to focus on annihilating a few Golden Core members of the Demon Clan first, making the Demon Clan terrified to show themselves, and to peacefully get through this opening of the space portal.
This move was a [deception].
It relied on the asymmetry of information between the two sides.
The Demon Clan, and even the Dragon Clan from the past, all believed that the Human Clan was still the invincible War God of old, an existence that suppressed all other races, and thus only dared to interact with the Human Clan with extreme caution.
Looking back at the entire opening of the Dragon God Immortal Palace, the Dragon God's arrangements... had a hint of flattery.