Binding the Snarl with purple quiddty without making the world anew

[RatElemental]

How does Thor propose to use The Dark One's purple quiddity to bind the Snarl without breaking the world?

Or, does Thor just want this world to last long enough for The Dark One to have sufficient mana to survive the inevitable destruction of this world and to survive to the making of the next world and thus the proper binding of the Snarl with TDO's purple quiddity?

He said they could spot weld the rifts forever. I imagine since he basically said the gods would handle the actual sealing, it won't leave behind a gate that can be broken, it'll just be a location in the world where a rift will never form again but is otherwise indistinguishable from the rest of reality to mortals.