Capítulo 900: Diwata Iraya's Current Weakness, The Reason Why the Island was Spared from the Crash of the [Giant Mechid]

Day 250 - 3:21 PM - Central Hut, Magical Village, Unnamed Mountain, Province of Catanduanes

To answer the question Mark asked, they had to recall all the way back when his group left this island.

When Mark's group left the island of Catanduanes, the battle against the Demons was yet to end. But with the main forces of the Demons scattered and mostly destroyed, it was just a matter of time.

In a few days, the Demon encampment in the Municipality of Bato was destroyed, and most of the captured humans were saved. Only most because a lot of them were not in any condition to be saved any longer. Most of the women that became seedbeds for the Demons were better killed off as their minds were broken and their bodies had been severely corrupted to continue living as humans.

Thus, those unfortunate people were given the fate they wanted long before their sanity vanished. Deaths.