Why did it become like this?
The trio's eyes danced maniacally when assessing the situation.
How can they all be so strong?
The aura Lucifer, Asmodeus, Belphegor, and Beelzebub exuded, showed that each of them can destroy all 3 princes on a whim.
Yet, they kept them alive all this while, like toys to entertain them.
Son of a b**ch!
Was their existence just one big sick home to them?
Luckily, they now had a way out, or they wouldn't be able to sleep well at night even if their 'uncles' let them go.
According to their agreement, no one, including the three of them, must attack each other's side.
The 4 ancient princes can't attack or wage war on them or their people, and they in turn can't attack the 4 princes and their camps too.
The trio knew that after 900,000 years, another full blown war might possibly erupt.
Only this time, these 4 ancient princes won't go easy on them anymore.