"Army of God" 

Archangel Michael opened the Gate of Heaven to summon his army of God, a huge group of elite battle angels directly under Archangel Michael's governing. 

When the black dimensional hole appeared, it was only a sign that a huge dimensional item was about to appear or descend. 

This thing created a 'hole' in the domain, and the domain shook seven times in a row, followed by the loud sound of the trumpet and angelic music from a distant sky. 

TOOT. TOOOOT. TOOOOOT. 

The trumpet of war sounded, and the choir of angels acted as the background music of the loud trumpet of war, giving strange yet harmonious music to the ear. 

The loud noise attracted the other demon lords, and when they saw the huge massive dimensional hole that was slowly forming something in the air... 

The demon lords' faces changed. 

[This lunatic— he wants to summon the Gate of Heaven?!]