"The Slime Army" 

It was true that the first person to be saved just disappeared quietly, but the other people could not escape so silently like that. 

The Godfather met various other races trapped inside the glass prison cells, starting from a weak-looking slime, a plant that could speak and move like humans, to various strange beasts. 

The slime had a highly corrosive acid inside their body, so they could digest a lot of things, which was also why they were called the most excellent trash decomposer. 

Then, when their bloodline was boosted or even evolved to a certain degree, their corrosive acid could melt the glass wall that trapped them all this time! 

This corrosive acid was even stronger than the abyss demon's miasma effect and Axelle's corrosive ability. 

And because the corrosive acid was not an ability and was something that came with their bodies, the slimes could use the corrosive acid to make a hole in the glass wall to escape!