Bab 1539: "Try To Summon Demon Lords" 

The other Archangels also grew the last pair of wings for the body they possessed with a tiny bit of their divine consciousness. 

All four pairs of wings were gorgeous and huge, but each wing never collided with the others, obviously not scientific anyway. 

Once Raguel stood on the altar, Archangel Michael, who was inside the first king's mind, immediately spoke in a cold yet majestic voice that sounded ethereal, far but also near. 

[Raguel. Control your medium to strengthen the domain. Change the domain's theme. This domain's core theme won't be able to hold back our Archangels' power.] 

The archangel spoke directly to their peers through telepathy, but they spoke in the special language of Archangels. 

For a while, the three kings, who could also hear the voice that directly sounded in their minds, shut their mouths tight, trying to keep their minds sober.