Storm Cage!
Owing to the arena's restriction, the Demandor God's domain only enshrouded the arena, and nothing more.
Dark miasma enveloped the entire arena, only for it to suddenly catch flame, turning into dark-crimson blazing flames.
They devoured the energy from the surroundings, turning stronger and stronger the more energy they received.
Nonetheless, the Demandor God was drained of a large amount of his mana as the constantly required amount of energy was far more than he had expected to need.
Every domain required a specific amount of energy in order to be materialized and maintained.
However, the more one developed one's domain, the least one would waste.
With that in mind, it was clear to see that the Demandor God's domain was powerful, yet riddled with flaws.
But that was only obvious because he had attained Godhood in the recent 250 years.
Fixing all kinds of flaws would require thousands of years, possibly more.