To Accelerate to the next level, one must pay the BPs to gain what they wish!
Can you reach for the high point of the Sky?
Level One ==> Level Two is 500 BP
Level Two ==> Level Three is 1500 BP
Level Three ==> Level Four is 2500 BP
Level Four ==> Level Five is 3500 BP
Level Five ==> Level Six is 4500 BP
Level Six ==> Level Seven is 5500 BP
Level Seven ==> Level Eight is 6500 BP
Level Eight ==> Level Nine is 8500 BP
Level Nine ==> Level Ten [Special Condition, PM Admins]
You cannot skip buying levels. If you have the BP to upgrade 2 levels at once, you have to purchase them individually.
Correct way: Level Two ==> Level Three - 1500 BP
Level Three ==> Level Four - 2500 BP Total = 4000 BP