The battle within the Lair of Nightmares had proceeded to the second phase before the ruckus it caused attracted the guards outside.
It was not that the guards were lax in their duties, rather, the collapse of the crystal pillars had totally annihilated all security and monitoring facilities. The demolition of the crystal pillars not only created a massive shock to the geological structure of the planet, but it also unleashed a mini-doomsday weapon in the form of an energy storm created by the crystals. The energy traveled along the crystal pillar and planet's crust through various tunnels, spreading all across the land. At once, it immolated the energy network around Amantir's equator rift as well as one-third of the planet's southern continent. It directly impacted the corrupted ones that were monitoring the planet's operations.