The Halloween Halo 2018 was available during the Halloween 2018 event on Royale High, from October 1st to October 31st. Its design features black spiders arranged in a donut shape, with a web design in the center. The Halloween halo was (presumably) the first to have its fountain stories not be of any importance to the luck of winning the halo. If the player was successful in winning the halo, their screen would turn red.
If the player was successful in winning the Halloween Halo, they would also receive the "Eerie Fog" badge. A total of 8855 users own it. The description reads "When the fog clears up, we'll be on our merry way back home."