@CRITGAME First: Great Game! 5/5 Rated! Second: I have a suggestion:
1º - Survival Arena! Explanation: Players may enter once a day on the Arena where they will fight all types of Strong Beasts (100 looks like a good number!) and if they win the Challenge, they will recieve a Special Item. Maybe a Unique (with it's own name like "Great Sword" or "Protector Shield") or a permanent boost in stats (like +10 Str that stays with you on reborn).
I'm not sure if that is possible, i don't know much about programming... But if you can do it (and want it) i'm sure the players will enjoy!
 "Battle without End"){kind=icon}