These are the valid codes, 

  • GearGoals—use this code for 250% Boosts, 3 Beach Summons, 3 Summer Portal Summon, and 50 Premium Metals (New)
  • SummerFix—use this code for Summer Showdown Cosmic Summon Capsules (New)
  • HappyMonday—use this code for 100 Rune Dust, 1k Diamonds, and Boosts (New)
  • SummerSunday—use this code for 1 Beach Summon, 3 Galaxy 1 Summons, 2 Galaxy 2 Summons, 1 Galaxy 3 Summon, a Summon Portal Summon, 100 Devourer Crystals, a 200% Coins Boost, a 200% Damage Boost, a 200% Drops Boost, a 200% Luck Boost, a 200% XP Boost, 50 Premium Medals, 100 Rust Dust, and 100 Scarps
  • ShowdownCosmics—use this code for Summer Showdown Cosmic Summon Capsules
  • ShowUp—Redeem for 100 Rune Dust, 1k Diamonds, and Boosts
  • SummerHype—use this code for 20 Cosmic Summons
  • SummerSoon—use this code for 100 Rune Dust, 1k Diamonds, and Boosts
  • Happy4th—use this code for a Galaxy 1 Summon, a Galaxy 2 Summon, a Raid Chest Key, 3 Luck Boosts, 50 Premium Medals, 100 Rune Dust, and 100 Scarps