Random drop in game.

Example item: https://steamcommunity.com/id/ilya515/inventory/#1086410_2_3128244394982902584

Item definitions: https://steamdb.info/app/1086410/items/
Community Market: https://steamcommunity.com/market/search?appid=1086410

https://store.steampowered.com/app/1086410
Thank "B l u e b e r r y P o p t a r t" again for all his recent finds.