Underlord.
"One of them died!" Gaia reacted strongly. Her heart was beating strongly against her chest because she felt a strong connection with one of the fighters. She was the mother of all life and could feel that one of them died.
But, the feeling she received from one of the fighters was strange because she felt like she was connected with that person on a spiritual level.
She couldn't tell who died because both of the fighters were at a power level equal to hers or maybe even above.
The Primordial Gods were gathered around her with solemn expressions. The fight between those two could have destroyed the entire world, but luckily, it seemed they understood their powers and managed to control enough to limit the damage.
However, the fire pillar obviously showed one of them lost that control and was seconds away from destroying the world's atmosphere.
The ice age wasn't far away from happening.
...