After Merlin realised that Gaius was possessed by the Goblin and that it had caused Uther, Gwen, and Morgana to suffer from flatulence in front of the entire court, he confronted the creature in the physician's chambers. The duel began when Merlin revealed his magic to the Goblin by shutting the door so that Gaius couldn't leave. The magical creature threw a dagger towards Merlin by using telekinesis, but the young warlock quickly blocked the knife with a spell ("Culter, ic þe hate!") and deflected it back at the Goblin, stopping it before it could reach his face. The Goblin told Merlin that while he could hurt him, he couldn't harm him without hurting Gaius. Merlin then dropped the dagger, sparing the Goblin's life, but warning him, right before leaving his mentor's chambers, that he would not rest until he found a way to force it out of Gaius (Goblin's Gold).
|Series 1: Merlin vs. Arthur • Arthur vs. Valiant • Merlin vs. Edwin Muirden • Sir Owain vs. Tristan de Bois • Sir Pellinore vs. Tristan de Bois • Uther vs. Tristan de Bois • Arthur vs. Evan • Merlin vs. Tauren • Merlin vs. Kilgharrah • Merlin vs. Nimueh
Series 2: Merlin vs. Jonas • Arthur vs. Morgause • Arthur vs Uther • Olaf vs. Arthur • Arthur vs. Kilgharrah
Series 3: Merlin vs. Morgana • Merlin vs. the Goblin • Merlin vs. the Sidhe elder • Gilli vs. Nollar • Uther vs. Gilli • Morgause vs. Merlin & Gaius
Series 4: Showdown with Morgana • Uther vs. The Gleeman • Arthur vs. Derían • Emrys vs. the Knights of the Round Table • Emrys vs. Morgana • Arthur vs. Sir Lancelot • Arthur vs. Sir Elyan • Arthur vs. Helios • Guinevere vs. Morgana
Series 5: Arthur vs. Odin