This is not impossible.
Immortal Kings are so powerful that they can make their domain tangible, something Shi Hao had already experienced in the Mortal Realm.
Therefore, if this plain is said to have evolved from an Immortal King's corpse, Shi Hao wouldn't find it strange.
Moreover, it's exceedingly odd for such a vibrant plain to suddenly appear here.
If indeed this is an Immortal King's corpse evolution, it could only mean that the Immortal King was incredibly extraordinary, affecting even the Forbidden Land.
Shi Hao recalled seeing an ocean before that looked unimpressive but could annihilate all life. It was also evolved from an Immortal King's corpse, so in this light, it's quite natural for this plain to be the same.
The position given would absolutely not be wrong, and Shi Hao wouldn't make a mistake finding it, so this must be the location of the Immortal King's corpse.
Let's take a look.
Shi Hao moved forward, but after a few steps, he felt pressure.
