We warn you, this is as horrifying as you'd imagine it would be.

And yes, some slight spoilers here if you're not up to date on Game of Thrones.

Ever since Qyburn's creation Mountainstein first appeared on our screens at the end of season five, we've all been wondering just what the hell lies beneath that mask. The eyes are creepy enough.

We know Septa Unella got a look at the monster in the season six finale (that scene still haunts us), and well, now we know why she was screaming so loud when saw him...

Yep, that's a face to haunt your nightmares.

On a lighter note, actress Hannah Waddingham, who plays Septa Unella on the show, had a witty response to the tweet;

If you need a sight for sore eyes after that, here's Septa Unella in real life.