Don’t bother spending any money to level up. It is a scam. As soon as I started levelling up the odds against you building up mana is drastically reduced. By the it is too late, you have wasted time, money and effort. The game ia designed to get you hooked and spending loads of money and then make you very weak so you feel as though you need to spend more. You are statistically more powerful at 2400 than at 2800.
