
Patch 8.7 will see the release of Masterwork Chests, which can only be purchased in the store. There’s also a bonus 3.6% chance of getting a Gemstone, and a 10% chance of getting a bonus chest and key.

In a typical chest, the odds of picking up a Champion shard are 25%, while getting an emote has odds of 10%. Typically, chests will drop a skin shard 50% of the time, but players are guaranteed to get at least one shard if they open three boxes, increasing the effective drop rate to 57%. Skins that are exclusive to the system, such as Hextech Annie, are an exception, with a one in 2,500 chance to drop. There are around 800 skins available that can drop from the crates, meaning that there’s roughly a one in eight (0.125%) chance of getting any given skin in any given chest. According to Riot’s post, the relative value of a skin does not determine the rate of drop, meaning a legendary-tier skin (the most expensive) is just as likely to drop as a common skin.
