Through September 2.
Marvel’s Avengers wants you to get your heroes leveled up in time for the War For Wakanda expansion, and what better way to do that than to have a double experience event? They could have also not made leveling take longer, but hindsight is 20/20. Starting August 5 and running through September 2, players will enjoy double experience to get their characters to max level and beyond.
Double XP! (8/5-9/2) – This continues throughout the month of August in order to help you get your Heroes leveled up in time for War for Wakanda!
Also with the double experience players have the opportunity to obtain extra chances at high level gear all month.
Check out the patch notes at the official website.