Treasure

Treasure Chests are tool items that contain cosmetic items. Most chests are obtained through the item drop system, although some can be bought directly from the store. They are modeled after what the chest contains; chests containing items for a specific hero will be styled after their respective heroes, while event crates will possess details related to the event. Treasure Chests can be opened with the use of a Treasure Key. Anything unboxed using an untradable key will become tradable on the date the key was supposed to become tradable.

Once opened to the tune of a cheering crowd, the player will receive one or more items from the chest's droplist. The chest and key are removed from the player's inventory and replaced with the received item.

Availability

 * Most chests are only Active for a period of time, then they are retired to Inactive status.
 * Most Inactive chests remain in the backpack, and can still be found on the Market.
 * Some Inactive chests are removed from the game entirely, along with its Key.
 * This usually applies to Event chests.

Rarity Tiers

 * Each chest comes with a list of common Standard drops, as well as a Very Rare drop.
 * Some chests also contain Extremely Rare drops.
 * All Extremely Rare drops are currently Unusual couriers.
 * Extremely Rare drops occur at approximately 1-2% chance.
 * Drop rates between tiers are assumed to be equal across all chests.
 * These tiers have nothing to do with item rarity.

Duplicates

 * Opening several chests will not yield duplicate items from the standard droplist.
 * Items that have been previously unboxed will not drop again until all items on the standard droplist have been unboxed at least once.
 * After all standard items have been unboxed, future chest openings will yield random items from the droplist.
 * Although this system ensures all standard items can be obtained after sufficient unlockings, item rarity still affects drop chances.
 * This means that a rarer item may not drop until more common items have already been unboxed.
 * This rule does not apply to Very Rare or Extremely Rare drops.

Multiple Drops

 * Some chests may drop one or more additional items when opened.
 * These include (INFO NEEDED), (INFO NEEDED), (INFO NEEDED), (INFO NEEDED)
 * Some chests, such as 37 - Ancient Scroll Case, always drop multiple items.