Strictly speaking, tearing space within the Spirit World and opening a passage to the Outer Realm were two entirely different matters.
The former was still achievable, but the latter was extraordinarily difficult. Luo Hong should not have been capable of it.
After all, the former only required grasping one or two Space Laws, whereas the latter required resisting the power of the realm barrier.
However, with a Profound Heaven Remnant Treasure assisting him and two grand formations inside and outside the Spirit World establishing a connection, Luo Hong could turn the impossible into possible!
This also showed that Luo Hong had clearly begun laying a trap for Earth Blood's main soul as early as when he set up the formation.
Based on intelligence from the original timeline, Luo Hong knew very well that Earth Blood intended to change his primary Immortal Path. However, he only knew that the other party would succeed three hundred years later and was not certain when exactly he had split off his main soul.
Fortunately, Luo Hong had previously used a Curse Art to attack the blood-robed figure's primordial spirit and discovered some clues.
Later, when one blood-robed figure was injured while the other showed no sign whatsoever of backlash, he completely confirmed that the main soul had already split.
After all, incarnation-type cultivation arts all carried a certain risk of backlash. Earth Blood cultivated the Twin Fiend Demonic Body, which had no distinction between main body and incarnation, making it even riskier.
Under normal circumstances, when the two blood-robed figures' strengths were almost identical, there naturally would not be any issue. But once either side showed weakness, the other would inevitably have some thoughts.
Therefore, unless both of them were incarnations, the two blood-robed figures would never have been so peaceful back then!
There