Keysare a form of currency used to purchase cratesin the Shop. They were introduced during the Christmas Event 2017.
Mystery Key is the only regular key in the game, and can be purchased in the shop for 125 Diamonds 
, and traded.
There are also other keys—Skeleton Key 2018 
, Snow Key 
—that can only be obtained through events. They served their same respective purposes, albeit for their respective event box instead. They do not work outside of events.
| Keys | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Ways to Obtain | Note | Image | |||||||||||||||||||||||||||||
| Winter Key | Complete challenges given during the Christmas Event 2017, exchanging gifts | First type of key and event key to be added into the game. Used to unbox 2017 Christmas Box The mesh for the key would be later reused for the Mystery Key. |  | |||||||||||||||||||||||||||||
| Skeleton Key 2018 | Obtainable through the Halloween Event 2018 tiers | 2nd key added into the game. Can be traded, but serves no purpose. Used to unbox 2018 Halloween Box. |  | |||||||||||||||||||||||||||||
| Snowflake Key 2018 | Obtainable through the Christmas Event 2018 tiers/Purchasing for 100 Snow Tokens | 3rd key to be added into the game. Can be traded, but serves no purpose. Used to unbox 2018 Christmas Box. |  | |||||||||||||||||||||||||||||
| Mystery Key | Purchase it for 125 Diamonds /Obtain through certain event tiers | 4th key to be added to the game, as well as the first normal key. Released as part of the Season 1 update. Can be traded. Unboxes any mystery box in the shop, excluding event crates. |  | |||||||||||||||||||||||||||||
| Pumpkin Key | Obtain through the Halloween Event 2019 and Halloween Event 2020 tiers | 4th event key added to the game. Used to unbox 2019 Halloween Box. |  | |||||||||||||||||||||||||||||
| Snow Key | Obtain through the Christmas Event 2019, Christmas Event 2020, Christmas Event 2021 and Christmas Event 2022 tiers | 5th event key added to the game. Used to unbox all Christmas Boxes from 2019 onwards. |  | |||||||||||||||||||||||||||||
| Reaver Key | Obtain through the Halloween Event 2021 tiers | 6th event key added to game. Used to unbox 2021 Halloween Box. Supposedly tradeable only during the Halloween Event 2021. This key is the only in-game key based off an NPC—Reaver. |  | |||||||||||||||||||||||||||||
| Currencies | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Normal Currencies | ||||||||||||||||||||||||||||||
Coins  • Diamonds  • Mystery Key  | ||||||||||||||||||||||||||||||
| Holiday | ||||||||||||||||||||||||||||||
| Type | Halloween | Christmas | Valentines | Easter | Summer | |||||||||||||||||||||||||
| Normal | Candies (2023)  • Candies (2022)  • Candies (2021)  • Candies (2020)  • Candies (2019)  • Candies (2018)  • Candies (2017)  • Candies (2016)  | Gifts  • Snow Tokens  • Logs  • Snowflake Tokens (2018)  • Snowflake Tokens (2017)  • Blue Tokens  • Red Tokens  • Gifts 2015  | Hearts  | Eggs  | Beach Balls  | |||||||||||||||||||||||||
| Keys | Traveler Key  • Reaver Key  • Pumpkin Key  • Skeleton Key  | Snow Key  • Snowflake Key  • Winter Key  | N/A | N/A | N/A | |||||||||||||||||||||||||
