Originally thought it was an invasion from a Different Dimension, but never expected it to be an entrance to the Earth Core World.
"Otherworld invasion" sounds terrifying, but it truly depends on who the enemy is.
Engaging in cross-dimensional play isn't an easy task; it requires a significant cost.
Soul Splitting of a strongman isn't so bad; as long as the plane coordinates are locked, and the altar is setup for positioning, one can descend with a suitable vessel.
But descending in one's true form is different. There's no shortcut; one must select an appropriate node to open a space channel.
Affected by space-time turbulence, the space portals between worlds are not safe and could be destroyed at any time.
Once destroyed, opening a new channel can only depend on luck.
With good luck, the channel can be opened in a moment. With bad luck, it might take a century without a chance.
