Key

Keys
Keys are tripwire hooks that are enchanted with unbreaking I. They are used to unlock Crates. Even though the keys are used to obtain rares from crates, the keys themselves can be classified as a rare using the guidelines on the main page.

Origins
Keys first showed up with the crates plugin back in 2016. When testing the plugin, applebranch made a handful of keys and dropped them at spawn. Unfortunately these keys did not work. Some players kept these keys and are now considered a test print rare.

Early Crate Keys
Crates existed before the April 2018, although they had longer time slots at spawn compared to the one month slot they have now. Rather than obtaining the keys from votes, players would spend diamond blocks at a shop chest at spawn and use the key to unlock crates. The chest would be refilled by admins once they ran out, similar to the current chest at spawn used for item rename tags.

Modern Crate Keys
The Epic Chest existed both in the older set of crates and the more modern. Not only that, the Epic Crate was released after the Epic Chest and contained a different set of rares but I think recycled the older key design.