[Proto Dragons, tear the roof off this cave and fill it with fire.] Cain ordered.
Half a second later, the room was filled with falling rock, bouncing off hastily erected barriers, as Cain surrounded his one ally in the room with a simple shield since it wouldn't fall to the Dragon Fire from his own group members.
The effect was much like standing in a volcano or a blast furnace. The rock walls glowed red, then white, then melted down into puddles as the ground everywhere except under the cultivators turned to a pool of lava with rocks floating in it where their barriers were.
Then the smaller rocks under the Elders sunk, and the barriers they had erected began to fail as shrieking filled the air.