Hearthstonerecently rolled outMurder at Castle Nathria, the second card set for the Year of the Hydra expansion cycle. However, oneHearthstonefan claims he knows what the next expansion will be–and that it will include the Death Knight as a new hero type.

Windows Central editor Jez Corden was the claimant behind these particular leaks. A well-known and credible source of leaks in the past, Corden made the claim on his personal Twitter.

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Corden claimedHearthstonewould be adding the Death Knight as a brand-new hero that cards could be built around, with Arthas as the default hero skin character it would use. He also said the Reborn keyword, which first appeared inSaviors of Uldum, will be making a return as an evergreen keyword, and that Undead would become a new creature type. His claims seem to center around another Scourge-themed set, whichhasn’t been done sinceKnights of the Frozen Throne.

There is some evidence to support Corden’s claim. Early in therelease ofMurder at Castle Nathria, players discovered an unused Location card template with Death Knight colors. What’s more,Hearthstonemodes design lead Matt London previously tweeted a hint pertaining to the unannounced third card expansion, which could be referencing a quote from Lor’themar about Arthas returning to Silvermoon.

Adding Death Knight toHearthstonewould be a huge deal. Only once inHearthstone’slong history has it added a new class to the game with the Demon Hunter. The Death Knight could be a fantastic opportunity to shake up the game in a truly unique way–and considering the card expansion is likely to release this winter, it wouldcoincide withWrath of the Lich King Classic. The addition of the Death Knight class could also potentially herald the eventual transition of the Monk or EvokerWorld of Warcraftclasses intoHearthstoneheroes in the future.

However, there are plenty of players who are reticent about the inclusion of a new hero inHearthstone. Every new class is another set of deck archetypes to be balanced, which means future sets will need to support them. The Demon Hunter’s rocky addition to the game caused no small amount of turmoil, though that has mostly calmed over the last three years since its inclusion. ThoughHearthstoneactively avoided adding the Death Knight as a full classin theKnights of the Frozen Throneexpansion, players will have to wait and see if it figures out a way to do so after all these years.

Hearthstoneis available now for mobile and PC.