It’s going to be a long, long time until the final season of Game of Thrones premieres on HBO, and the network is trying its best to keep the plot of Season 8 a secret until then. Unfotutnaley for them, it seems like something happens that was too monumental to hide from prying eyes and locals who were out to get set footage.

This post may contain a spoiler for Game of Thrones* Season 8, and if true, it’s a very, very big spoiler, so be warned.

According to Watchers on the Wall, the premiere Game of Thrones fansite with a knack for spotting any and all potential spoilers, Winterfell’s days may be numbered. On Wednesday, a UK resident shared a video on Facebook of what looks to be the Winterfell set engulfed in flames. Undoubtedly, there’s lots of theatrical smoke and deliberate lighting to make the inferno look bigger and pop on film, but there’s no mistaking it: This is a big fire, one Winterfell might not come back from.

With Game of Thrones approaching its endgame, the state is right for something as dramatic as the loss of the Stark ancestral home. And, the Night King and his horde of wrights are marching south after bringing down the Wall in the seventh season finale. Winterfell would likely be one of their first stops.

How, exactly, Winterfell bites it is unknown. Perhaps the Knight King, riding Zombie Viserion, razes the castle. HBO has changed the color of fire in post-production before (Season 2’s big wildfire explosion comes to mind), so some of these yellow flames could be blue by the time we see them in a final episode. Or maybe Cersei did what Cersei likes to do, and blew up her enemies again. It’s also possible that the Starks torched their own home in a desperate bid to stop the enemy from advancing further south.

We won’t know for sure until Game of Thrones premieres sometime in 2019.

If you liked this article, check out this video about blue zombie dragon fire.