He looks deeper into the past, tracing the threads back 100,000 years to when this room was not here, and instead was a hidden cache.
The Catacombs are destroyed. (perhaps Dominus slows time or does something far more clever and signature of Macedonia?)
Dominus is too engrossed in his work to notice that the base has been destroyed around him. He pulls out of the worldlines and realizes the utter destruction. "Well, this was unexpected." He booms to another location.
Deviox walks down, marking his path as he navigates to the center of Destral. There, he plants several explosive charges before backtracking. Safely out of the way, he detonates them, watching grimly as the island began to cave in on itself.