How do you get the Nightbringer Kayn Prestige Edition Icon?
It came with a Prestige skin. Riot's description in the client reads: “This icon was acquired by obtaining the Prestige Nightbringer Kayn skin during the Worlds 2021 event.”
Is the Nightbringer Kayn Prestige Edition Icon still available?
Only with its Prestige skin. The Nightbringer Kayn Prestige Edition Icon comes with that skin, so owning the skin gets you the icon.
