By territory I see it as either Grey Rat being practiced by many people or many people wanting to practice Grey Rat.
Also it's Grey Rat not Blue Dragon Against the Heavens. OP bait doesn't exactly scream Grey Rat unless it's a death world -which most Xianxia admittedly are- rat.
If the style kills the user more than it doesn't, it's a bad style. A powerful, insanely picky not rat style. Efficient 'waste nothing or nature unalives you' rats I can see, reliable 'oh my God there are so friggin many' rat flood I can see, tricky 'I don't know what they're going to do next' rats I can see.
Rats are survivers, many, and sly. Not few, strong, and god like.
Also a super strong style isn't all it's cracked up to be when the practitioners start a battle royale with each other and suppress any mention of Grey Rat to keep others from reaching their height of power. Because Xianxia can be unpleasant, I agree. Worst case scenario (Hooray pessimism).
Also my impression from the synopsis is that we're going to have some influence on the practitioners to get some treasure. How much influence will we have when they're god like?
What'll happen if they decide they don't like listening to that little nudge that tells them to do something, or voice in their head, or that dream that they had.
We aren't even sure how powerful we are and if we practice OP Style it could potentially kill us just like it did to all the other smuckes who thought they'd be that 1 in a 100000 to not die.