You can get Lootbox's by Voting on the weekend's, Randomly while mining, Leveling up, Donating, and Inviting. You can use them by doing . There are 6 different types. Each give different items and cost a certain amount of 
Keys which are all League based.
 Lootboxes in Discraft
|
|---|
 Normal •  Uncommon •  Rare •  Legendary •  Ultimate •  Mythic
|