Colosseum


 * 1) Defeat Skeleton King for each class to unlock Colosseum mode for the given class.
 * 2) Start with 80 star, and 30 star will added for every round.
 * 3) Start with 100 coin, and 50 coin will added for every 3 round.
 * 4) Bonus coin = (roughly) your max round, maximum is 50 coin.
 * 5) By killing special Knight bosses (They appear at 30th round) you unlock new heroes for use in Colosseum