Heavily inspired by the Lost Hornet skin mod from Hollow Knight: Silksong, Yi gets lost in the Void and lets it take over, augmenting his powers (just visually!). The pack features a custom hold talisman animation for Qi Blast and Full Control.
Requires Yukikaco's CustomSols mod to work: https://thunderstore.io/c/nine-sols/p/Yukikaco/CustomSols/ (and implicitly, the Nine Sols API). BepInEx's Configuration Manager is highly recommended.
Make sure that CustomSols is working properly once downloaded and set up. In the .zip file downloaded, navigate to "config\CustomSols". You will find two folders, "Lost Yi" and "Lost Yi - High Visibility Version". Place these folders in "[Nine Sols game path]\BepInEx\config\CustomSols" along with the other texture packs, such as "Default", "ExampleAllUse" and so on. Once you're ingame, open the Configuration Manager with F1 (or otherwise, edit the config file yourself before launching the game), go to "CustomSols" and select the pack that you would like to use from the dropdown. Loading will freeze your game for several seconds. Do not panic or interrupt it.
CustomSols will soon be updated to better work with skin packs. I hope that most issues will get fixed with the update to it! I've edited most-if-not-all of the sprites in the pack so if there's any that are actually missing, contact me and let me know in what situation they have been discovered. There's lots of unused sprites in the pack.