Epic Rap Battles of History tend to be hit-or-miss, but their latest falls on the ‘hit’ side of the spectrum. George R.R. Martin takes on J.R.R. Tolkien, and both gentlemen get in some decent jabs, with Martin pointing out that “There’s edgier plots in David the Gnome” and Tolkien countering that “C.S. Lewis and I were just discussing how you and Jon Snow both know nothing.” And yes, Led Zeppelin makes a cameo appearance. Watch below!