Worlds, Tales from the Rift, and K/DA content will be available for crafting (except Worlds and Spooky Position Orbs) again between November 16, 2018 at 8:00 a.m. PT to December 3, 2018 at 11:59 p.m. PT.
Last day to get Worlds tokens
You'll stop being able to earn or buy tokens on November 19, 2018 at 11:59 p.m. PT. After that, you'll be able to craft all Worlds, K/DA, and Tales from the Rift content using your remaining tokens (except Spooky Position and Worlds Orbs).
Prestige Edition Kai'Sa
A Prestige Edition skin is a standalone skin with a loading screen border, splash art, and VFX. You don't need the K/DA Kai'Sa skin to own the Prestige Edition. You can get it by forging it with 2500 Worlds tokens, or from loot drops in chests, orbs, or rerolling skin shards. It follows the same rules as mythic skins.
To earn enough tokens for K/DA Kai'Sa Prestige Edition, you'll need to purchase tokens from the shop or pick up the Worlds Pass, which lets you earn tokens from every matchmade game.