610 The key to victory and loss

When a Gu Master advances to an immortal, their aperture will transform into an immortal aperture.

The immortal aperture is a qualitative evolution of the aperture, it is like the creation of a whole new small world.

Rank six and seven Gu Immortal apertures were known as 'blessed lands'. Rank eight and nine Gu Immortal apertures were called 'grotto-heavens'.

If a Gu Immortal's lingering obsession was left behind when they died, it would combine with the heavenly power inside the immortal aperture and become the land spirit.

Every immortal aperture is unique, it is a part of the Gu Immortal's body. In some ways, even if a Gu Immortal dies, the land spirit and immortal aperture that they leave behind could still be considered a strange form of life extension for them.

Precisely because the land spirit is formed from obsession, it is rigid and not flexible.