The Tribunal Lords were not stupid — selfish, yes — but not stupid. During the entire ordeal of Trinity Venerable laying down this array, they kept their eyes closed on him. Unfortunately, most of them still needed to heal, so it's hard to tell how good a job they had done. Regardless of the truth, everybody — for now — agreed with his actions.
So, after checking the control talisman one last time, they acted together to activate the Black Tortoise Array. A humongous dark tortoise manifested in the universe — specifically, around a small part of the Heaven and Earth Origin Cycle Array. It roared to the Heavens for a few seconds before turning into an invisible protective shield.
