The skin is not available for purchase and has been placed in the Legacy Vault (they can still be mystery gifted, and only appear in a champion’s information tab if owned). The vault is usually opened for limited runs and this skin can then be purchased in the Riot Store. In my experience it can be rather long between each opening of the Legacy Vault, hang tight!

Noxus Hunter Anivia is a League of Legends skin for Anivia. This page highlights the skin's splash art, cosmetic theme, release details, and related Anivia skins.