Demon with Angel Wings

In the depths of an oceanic trench, a prison strong enough to hold angels was formed by the strongest demi-angel, who ruled over space with the wave of a hand. This prison was perhaps his greatest work since the beginning of time. 

While the simple hall did not look like much, its intricacy made it impossible for its inhabitants to escape. 

This place was within the deepest trench in the ocean. At the bottom of it, the king of demi-angels had carved out an independent space and placed a platform with three pedestals. The pressure of over eleven thousand kilometres of the water column could be felt, even though the prison was dry. 

Three angels were each bound to a pedestal with chains of an unknown material. The pedestals looked like small altars, and each of them looked like a sacrifice. Their wings were concealed, but that did not diminish their inward aura of power. Their majesty would have been apparent if anyone could see them.