There was no Outer Dao dharma gate mentioned by Senior Brother Hou Ping on the third floor of the Scripture Depository Pavilion.
It was not that things like Outer Dao Dharma Gates did not exist, or that Hou Ping had made them up.
Rather, it was because of the special nature of Outer Dao Dharma Gates,
which made it impossible for them to be collected within the Scripture Depository Pavilion of an immortal sect.
After browsing through many Jade Slips on the third floor of the Scripture Depository Pavilion,
Shen Changchuan learned something: Outer Dao Dharma Gates were bound to the cultivation techniques from which they originated!
For example, the third-tier Spell Lin Wushuang had used during the grand competition was, in a sense, an Outer Dao Spell.
Its use fundamentally relied on the power of Lin Wushuang's bloodline.
It was precisely because the cultivation technique and spells he cultivated were suited to the trace of ancient great demon bloodline within him that he could wield third-tier spell techniques while still in the Out of Body Stage realm.
If such spell techniques were placed in the hands of someone without that trace of ancient great demon bloodline, they might perhaps be forcibly activated to some extent, but their power would be drastically reduced as a result!
This was the essence of why Outer Dao Dharma Gates were bound to their cultivation techniques.
Take Gu techniques, for instance.
Gu Dao methods comparable to third-tier Spells generally also required Gu Dao cultivation techniques at the Spirit Wandering realm level to activate them.
The same applied to Outer Dao paths such as body refinement and talisman cultivation!
Unlike ordinary third-tier Spells, which could be cultivated and cast so long as one's mana traits aligned even if one cultivated a different technique,
Gu Dao