Prestige Nightbringer Kayn

The Prestige version of Nightbringer Kayn is the upscale edition of the regular Nightbringer skin and arrived in the same 2021 window. It belongs to the Mythic rarity tier, which is reserved for Prestige editions. Because these skins are usually obtained through event-based methods instead of a straight store sale, no RP cost appears for it.

Its Rare availability tag shows that getting hold of it takes more than opening the shop; in most cases, you had to be taking part in the specific event linked to its initial release.