I am very interested

Jingyang carefully moved backward, his eyes fixed on the back of the wolf that was eating.,Three gray wolves in a pincer formation, pushed aside the clumps of grass, stepped with all four paws, and let out a low growl like a threat, slowly pacing towards Jingyang.,Was it congenital heart disease Jingyang's face was pale, or... He clutched his chest and looked at the wolf corpse across from him, which was no longer moving after being torn apart. Was that strange breath that pierced into his heart because of this wolf's death。