"Welcoming The Warriors" 

The sky was ripped open, and the sunlight suddenly became so bright over there, literally shining over the hole in the sky and the gigantic stairs that one usually saw in rich mansions or something. 

The bright light prevented people from seeing what was inside the hole, but just looking at the void that was torn open, it looked a bit different from how the Underworld Gate was summoned to this world. 

Indeed. The Underworld Gate was summoned with a legal channel, while this one used the combined domain, the angel's choir and the Stairs of Heaven to forcefully rip open a little hole to a specific dimension. 

Once the hole in the void widened enough for two war chariots to pass through, the ten elders immediately resumed singing. 

But this time, the song they sang together was different from the Angel's Choir before. 

It was way more cheerful and happy, as if they were welcoming a sacred existence from far away or something.