As Merlin's worry grew, she only got even more mortified when she saw Arad's magic signal slowly fading while the other one growing larger and larger. He was losing, and fast. She didn't understand what was going on. Did he absorb the heart, and is it now poisoning him from the inside out? Why is the mountain shaking so violently, and so hot?
Inside the mountain, and after flinging one [Ho-white Nova] to test the mountain's strange durability, Arad was certain it could withstand more. Cain also confirmed that, proudly claiming that the whole mountain isn't meant to keep people out, but to keep them inside.
And just like that, the inside of the room got consumed by an ever-burning, pale divine flame as one [Ho-white Nova] exploded after the other.
Since Cain is too fast to catch, Arad had to rely on AOE. But, Arad didn't understand how this stupid overgod still looked as pristine as ever, even inside the burning inferno he created, Cain remained unharmed.