Immortal Realm's Distant Calamity

The Great Profound Realm did in fact have the concept of "heart demons."

For instance, when Xu Xing emerged from seclusion, True Monarch Purple Universe of the Supreme Dao Sect in Mystic Sword City had also happened to be undergoing Dao Integration.

Having been defeated by a Dao Integration cultivator of the Sword Sect, he had become trapped by a "heart demon."

Yet the "heart demon" referred to here meant one falling into a so-called "obstruction of knowledge and views," hindering a cultivator from realizing the truth and advancing their cultivation.

Put more plainly, it meant getting stuck in a dead end and being unable to get past one's own mental hurdle.

To some extent, it could be seen as a flaw appearing in a cultivator's mind—their Dao Heart no longer perfectly whole, thus blocking further growth in cultivation.

But regardless, the "heart demon" spoken of here was merely a conceptual psychological issue. It possessed no actual form.

Yet now—

The "heart demon tribulation" Xu Xing had sensed was entirely different.

It was a truly tangible "tribulation." When a cultivator advanced into a major realm, it would exploit any opening, manifesting the karmic forms of past lives like Dao Delusion and awakening the thing a person feared most deeply.

Xu Xing was the True Immortal who had traveled the farthest; even Dao Delusion itself found it difficult to shake his mind.

Ordinary cultivators, however, were different.

Even if it was merely a change brought about after Dao Delusion radiated through the Chaos Sea, an exceedingly insignificant wisp of it, it would still be a calamity that could bring life-or-death danger with the slightest carelessness.

If this change continued to spread throughout the Chaos Sea, cultivators across the Heavens and Myriad Worlds of the Chaos Sea would all be affected by