Trade knife and another skins for another knife
Tradelink: https://steamcommunity.com/tradeoffer/new/?partner=147599115&token=bkUbDPFq

➜ Silver 1 : ✘
➜ Silver 2 : ✘
➜ Silver 3 : ✘
➜ Silver 4 : ✔
➜ Silver Elite : ✔
➜ Silver Elite Master : ✔
➜ Gold Nova 1 : ✔
➜ Gold Nova 2 : ✔
➜ Gold Nova 3 : ✔
➜ Gold Nova Master : ✔
➜ Master Guardian 1 : ✔
➜ Master Guardian 2 : ✔
➜ Master Guardian Elite : ✔
➜ Distinguished Master Guardian : ✘
➜ Legendary Eagle : ✘
➜ Legendary Eagle Master : ✘
➜ Supreme Master First Class : ✘
➜ The Global Elite : ✘