Experience
Experience Points (XP) are required in order to level up and gain Legendary Ranks. The main way to gain XP is through playing 1v1, 2v2, Juggernaut, or NPC Simulation. Challenging NPCs within 5 levels below you also gives XP if you win, up to 300 times per day. See Battle Rewards for more detailed information on the amount of XP that can be earned from each of the battle modes. You can also gain XP as a reward from some Daily Missions and Battlepass.
Experience Boost
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.
Power Hour
Between the hours of 10 - 11 AM (EDT) and 10 - 11 PM (EDT) from Monday - Thursday and all day Friday, Saturday and Sunday, XP from battles 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.