The Primordial Bone Dragon attacked the heroes again, this time using its other rune seals. Some of its bones separated, activating the Thorn seals. Then, the Repulsion seal flared up.
Hundreds of bones shot toward the heroes, now like divine spears, capable of piercing anything. The heroes' eyes widened, panic setting in.
This was no less powerful than the initial attack. However, the bones would be lost afterward. It would shoot again and again, but despite its massive size, its bones weren't infinite. That abomination didn't want to defeat them but just force them to defend themselves with everything they had.
After a few moves, the Sharpening seal could be used. Once it was used, there'd be nothing left to buy time again; then the Dragon would be destroyed in the interval between uses.
'We have at most ten minutes,' Alm and Bruno concluded, moving toward the small world where the body of the Nine Stars Tree was.
