Requirements: You need to have the ability to defeat a level 250 and level 200 monster. Speak with King Vargas and ask him if he has some jobs for you. Apparently the king had been working on some sort of creature - and experimentation, of sorts - to use as a castle guardian, because apparently there have been a good deal of recent Troll strikes and his knights are barely able to conquer them. Inform him that it is possible to help him RS gold and he'll tell you that General Willus is in charge of the undertaking and can tell you what supplies you want to create the creature.
Talk to him and he will tell you that you'll require some Precious Metal, which can be dropped by Trolls about the island and is untradeable. Trolls are just around level 25 - 40 and drop the metallic everytime. Get ten of them and then bring them back to him. Nowadays you need to smith the metals into a body to the animal. Now you need to produce legs from boards. Get 20 planks and then use a hammer and a few nails on them to make four legs. Get about ten cowhides, tan themand then put them together with a needle and string. Today Willus would like you to build the head.
Behind the castle is a ladder which leads underground. Go down it and you will find 3 paths. Take the path in the center and you're going to discover a large open space with a bunch of level 250 demons. Kill one of them Buy RuneScape gold and it'll drop its head. Use the head with a few cloth (you need 10) and then cover it with a needle and string. Receive a team from Zaff or another player and use it with the mind to turn it into a head on a pole.