|Wooden Chest||Leather Chest||Iron Chest||Golden Chest||Magic Chest||Dwarvish Chest||Primal Chest|
Chests can be obtained from sending your heroes out on quests. Chests contain special blueprints, rare resources, or items of varying quality (usually great or above). In the trade house, chests of item level more than 5 above your player level are not visible to you. For example, if you are level 5, you can see Wooden and Leather chests, but not above. The list of blueprints available only from chests can be found at Chest Blueprint List. The odds of a chest being found at a quest seem to be related to how many of that chest you have in your inventory: having none of them seems to significantly increase drop rate over having many of them.
Chest keys are found after quests (only a small chance with a six heroes team, no chance with smaller teams), in the roulette, in bags, and on the trade house. Some of the Special Orders also offer keys as reward, though not all of them.
A certain number of each chest must be opened for keys on the Trade House to show (when available). The "For Key on TH" lists the number needed for each. Note that this limit blocks viewing on offers and requests and selling/offering keys, however it does not block a player from requesting keys. (for gems of course, since keys requested for maximum gold get to the back of a many months long queue)
|Chest Type||iLvl||to open||For_Key
|Wooden Chest||1||25||Open 25||City Sewers, Forbidden Meadow, Gloomy Manor, and Haunted Forest|
|Leather Chest||10||50||Open 25||Catacombs, Mountain Hideout, Ancient Ruins, and Pirate's Cove|
|Iron Chest||16||100||Open 20||Desert of Doom, Plague Lake, Dead River, Unholy Land and City Raid - medium|
|Golden Chest||25||250||Open 20||Orcish Valley, Old Tower, Lost Labyrinth, and Heretic Temple|
|Magic Chest||35||500||Open 15||Hellish Abyss, Pyramid, Floating Island, Dragons' Nest, and Chaos Gate|
|Dwarvish Chest||40||500||Open 15||Uncharted Jungle, Ice Palace, Ring of Fire, City Raid - hard|
|Primal Chest||45||750||Open 10||City Raids|
Note: when the player already has a raid's blueprint, the 25th raid milestone gives the primal chest, but doesn't give the primal key. Primal keys have been confirmed to exist in the Champion bags gotten from Arena (PvP) Tier Rank 4.