δράκων / drakon

δράκων / drakon 

...from which we get the word dragon. Just in time for the last season of Game of Thrones. The dragon is only ever mentioned in Revelation in all of its forms δράκων, δράκοντα, δράκοντι, δράκοντος. 

Then I saw another beast rising out of the earth. It had two horns like a lamb and it spoke like a dragon! Revelation 13:11

Is it a real dragon as portrayed in Game of Thrones and other Fantasy novels and movies? That's subject to interpretation. Revelation has a superscription that states right in the first verse that it was, "...The Revelation of Jesus Christ, which God gave Him to show to His bond-servants, the things which must soon take place; and He sent and communicated it by His angel to His bond-servant John..." The word communicated here is actually ἐσήμανεν / esēmanen and means signs or symbols...again, its where the English word semantics finds its root. What the angel communicated to John was symbolic not necessarily literal. That means anything that comes after Revelation 1:1 has been communicated in semantics or word pictures/symbols (Ref: Dan 2:28-30, 45). So is it a real dragon? The ancient Greeks classified a "dragon" as a type of serpent and was believed to have incredible insight, able to spot prey in any hiding place. This in theory could be Satan himself. The passages are not entirely clear at times.