There has never been just one way to open Spirit Veins. It's not as though the only method is to do as Xiong Batian did and digest the bloodline of a Great Demon that had already opened its Spirit Veins. Members of the Demon Race are also known to use Treasures of Heaven and Earth for this purpose.
Of course, opening Spirit Veins with Treasures of Heaven and Earth is extremely difficult, mainly because such treasures are incredibly hard to acquire. Where in this world could one possibly find so many Treasures of Heaven and Earth capable of opening Spirit Veins?
Rumor had it that the Taihu Python possessed some Treasures of Heaven and Earth that could open Spirit Veins. Then there were the current Eight Great Dominators, who controlled the Eight Great Spirit Fruits. Beyond that, Jiang Qiu had heard of very few other sources.
