How to get Championship Zed

So yes i saw many tutorial no youtube but i think these tutorials are fake. Link to one of them I had shockblade zed and at this moment i have project zed And yes i want to ask question. Is any way to get a Championship Zed? I mean how i can get this skin. I need buy hextech chest or i need to get level on Zed [I have 6 Mastery On Zed] because i have some riot points and i want to know how to get zed because i love this skin. In up thanks for explanations and Answers ! {{champion:238}}
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