Monster Ranks leveling

To become a C class monster you must fight 10 different battles-A battle can happen anywhere, unless otherwise stated by an Admin. You must at least win 3 battles.
To become a B class monster you must fight at least 30 battles winning at least 17 Battles-10 wins must be from equal class or higher
To become an A class monster you must fight at least 100 battles winning 70 of them 50 of those wins must be against an A class or S class creature
To become a legendary S class creature you must fight at least 300 battles, winning at least 225 battles 25 of those battles must be against an S class creature wich is not of your clan
This is the official leveling system