Experience points are required in order to level up and to gain Legendary Ranks. The amount of experience gained per battle depends upon the level of your opponent. Defeating opponents who have higher level than yourself will award more experience than defeating opponents whose levels are lower than yours. For team battles, take the sum of your team's levels and compare to the sum of the opposing team's levels.
Experience Boost can be bought for 50, 175 or 495 Varium from the Upgrade Shop. The boost doubles the amount of experience received from battles. The duration of the boost varies depending on the one you purchase and if you lose, the XP gained is not doubled.
Between the hours of 10 - 11 AM (EDT) and 10 - 11 PM (EDT) from Monday - Thursday and all day Friday, Saturday and Sunday, XP is doubled from the effect of Power Hour. If you lose, the XP is not doubled.
Experience by Level
Experience by Legendary Rank
Experience points gained in Legendary Mode, which is unlocked when a player reaches level 40, increases Legendary Rank instead of level. For each Legendary Rank, you need to earn 7500 experience to reach the next Legendary Rank.