Goblin

"Goblins are the most mischievous of creatures. Mischievous and dangerous. Goblins will stop at nothing to get their hands on the one thing they value above all others, gold."

- Gaius on Goblins A Goblin is a mischievous, humanoid, magical creature with green skin, black tattoos, and an insatiable lust for gold.

History
When a woman took the bella-donna, which could induce hallucinations, she experienced a hallucination of a Goblin dancing in the fiery coals. The Witchfinder, Aredian, used this as evidence that a sorcerer was loose in Camelot (The Witchfinder).

Merlin once accidentally let a goblin loose in the city of Camelot whilst he was fetching an old tome for Gaius. After being released, the goblin possessed the body of Gaius and began to wreak havoc on the kingdom. After King Uther lost his hair and Prince Arthur grew a pair of donkey-like ears, the citizens of Camelot knew that something wasn't right. The goblin then put the blame on Merlin after hiding a book of spells in his room. Determined to see justice, Gwen and Merlin tricked the goblin into licking a gold coin laced with poison. The tiny creature fled its dying host and was trapped inside the lead box once more. Later the box was stored deep into Camelot's vaults, where no one could release it again (Goblin's Gold).

Characteristics
Goblins enjoy playing tricks and pranks on innocent people. They are magical creatures capable of transforming themselves into small bright balls of light. Whilst in this form, they are capable of possessing another living thing and controlling their body and thoughts, and one would've possessed Merlin with all his powers, however Merlin was able to trap him in his mouth and kept the Goblin from taking control of his body probably using magic, until he spit him in to the lead box. Goblins are also capable of magic and can perform various magical spells without an incantation. They also have psychic abilities and can look into the heart of a person and read their mind. While in the body of a Human, they are exceptionally strong, as the elderly Gaius was able to defeat a muscular man in arm wrestling.

Abilities
Goblins are powerful magical creatures. They have the ability to turn into a mass of light and possess another person to impersonate them. When controlling Gaius, the Goblin is shown to be very skilled in magic. Like Merlin, he is capable of moving items telekinetically. He is also capable of conjuring potions with magic, which he passes off as "medicine" but are actually potions that induce symptoms such as flatulence and boils. Furthermore, he was able to read another person's mind and heart just by making eye contact. He revealed to Morgana that he knew she was a traitor who was plotting the demise of Uther and the destruction of Camelot. Also, he is capable of enchanting a curse upon another person, as seen when he cursed Uther into baldness, and later cursed Arthur into having donkey ears and not being able to speak when he found out the truth about Gaius.

In addition to their magical abilities, Goblins are also very fast and agile, making them very difficult to catch. When possessed by the Goblin, Gaius gained enhanced physical strength, to the point of easily beating a muscular man in arm-wrestling, despite Gaius's advanced age.

Biology
Goblins are small creatures, at about four feet tall. They have lime green skin and long, pointed ears. They have large amber eyes and are capable of human speech and intellect. Goblins have some kind of black tattoos or markings all over their bodies. Once in the body of another, goblins are notoriously difficult to remove. The only known way is to poison the person, as if the goblin's host dies, the goblin dies with them. Once the goblin has left its host, the person can then be given the antidote to the poison. Another of the goblin's weaknesses is that once encased in a box bound by lead it cannot escape. Goblins are famous for their constant thirst for gold and will not allow anyone or anything to get in the way. They are also smart and are constantly thinking of new pranks to pull at their innocent victims.

Appearances

 * Series 2
 * The Witchfinder 


 * Series 3
 * Goblin's Gold 

Trivia

 * The goblin was voiced by English actor Mark Williams.