Thus, he chose the simplest and most direct method, the Reckless Knight's method, which was a brute force attack, breaking through the protection directly. Teleportation was not possible, so if he wanted to gain anything, this was the only way.
With Long Dangdang's current ability of the Gently Absorb Slowly Regurgitate Spirit Furnace, the concealment time for such a high-level attack up to 9th Rank was only three seconds.
So, when the array was just breached, there was no reaction from the outside, unless one focused on the protective array, then they could notice the energy of the array weakening. After three seconds, the roar and disruption of the array would be transmitted.
Long Dangdang utilized that brief window of time.
The moment the array and granite walls were blasted open, all barriers had already disappeared. The next moment, the Far Horizon Proximity Spirit Furnace transported Long Dangdang into that treasure chamber.