The duelling price keep increasing along with our level. Meanwhile it is getting harder to get coins. Now i had to pay 450 coin for a duel, 9 times the price from the first duelling price. It doesnt worth it. Sure, if we win we could get some point and one life energy, but when we lost, we get nothing. If the price is so high at least make it worth it. And make it easier for us to get coins