What happens when two of the greatest fantasy series of all time (Game of Thrones and The Lord of the Rings) face off against each other? Let's just say the results aren't pretty.

This isn't the first rodeo for YouTube user RackaRacka. Just a few months they pitted Harry Potter versus the Star Wars universe in an amazing display of special effects, and now their back

So who will win this Ultimate Nerd Showdown between Game of Thrones and The Lord of the Rings? You'll have to watch the video to find out.

And I'm going to warn you right now, those with a weak stomach should leave the room. There's plenty of blood and guts and cave trolls to keep you tossing and turning for several nights. You've been warned.

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