Loot Boxes contain Weapons, Armor parts, Gold, Crystals, Boosts, and other items.
Special Loot Box - You can open Special Loot Boxes with Superior Energy which you can get by completing Daily Challenges.
Normal Loot Boxes - You can open Normal Loot Boxes with Energy which you can at the end of a Battle.
Free Loot Box - You can gain free rewards from the Free Loot Box.
You can get Loot Boxes as Event Ranking Rewards, Battle Star Event Rewards, or Leveling Rewards. You can also purchase Loot Boxes or get them as free rewards.