Catalog:Infernal Undead Immortal Sword

Infernal Undead Immortal Sword is a limited unique back accessory that was published in the avatar shop by on October 12, 2018, specifically for Halloween. It is a part of the Immortal Sword series, and can be purchased for 13,000 Robux with 31,000 copies in stock. As of December 28, 2021, it has been purchased 6,987 times and favorited over 80,437 times.

Appearance
It features a large sword made out of a green handle and a silver blade. On the blade, there are purple inscriptions surrounded by a green glow. A large decorative spider is visible between the handle and blade, while a small bovine skull hangs off of the handle like a chain. When worn in-game, this item periodically emits small clouds of purple.

Trivia

 * It is the first limited unique Immortal Sword in the series to not be sold with a stock of 100 copies.
 * Many users are confused about the decision to sell this sword with a stock of 31,000 copies instead, as the vast majority of players on Roblox who purchase items in the catalog do not have 13,000 Robux to spare.
 * It is the first Immortal Sword to have a special effect, as well as the third accessory in the avatar shop to produce a Smoke effect (the first being Rbadam's Smokestack Top Hat and the second being the Singed Scientist Hair).
 * This is the longest a limited has not sold out since its initial release, being three years, and will most likely not be sold out for a very long time.