While the event stage mentions unusual monsters, you only have to locate eight NPC with red and blue oni masks. You will be rewarded with Primogems and Festive Fervor upon completing the challenge.

According to the latest Fortnite Chapter 6 leaks, Demon/Oni Masks will be added to the loot ... solo or multiplayer titles on PC. His love for Red Dead Redemption 2 and Stellaris are unparalleled ...