A Rank-3 beast is on top of the food chain in this continent and even among them, Titanwolves are on top. As soon as Fenrir reached Rank-3 he is already stronger than ordinary Rank-3 beasts, But the path after that is cut off. No one has seen any Rank-4 beast or even if they've seen one they probably didn't live to tell the tale.
Vishnu has already thought of several methods to help Fenrir reach Rank-4. He has more knowledge of it than anyone here on this continent. Arthur has given him some insights so Vishnu is confident that once he reached the Star Force realm he'd be able to help Fenrir.
