Now go back to the guild master

To start, talk to the guild master in the champions' guild south of Varrock. You will talk to him about the rune plate body. He will tell you to go to Oziach in Edgeville, near the cliff, and ask about the rune plate body. He will tell you that he would give it to you until you slay the dragon in Crandor. Go back to the guild master and talk to him about it. He will tell you that you need a shield to protect you from the dragon breath attacks. Head to lumbridge, go to the 1st floor of the castle, talk to Duke Horacio and he will give you an anti-dragon shield. Now go back to the guild master then he will tell you that to reach Crandor, you need a map. This map was split into 3 pieces, and 3 wizards kept it. Their names were Melzar, Lozar and Thelzar. He will say that Melzar's map piece is kept in a maze called the Melzar's maze. He will give you a silver key. Lozar's map piece was lost, which was stolen by some goblins. And Thelzar's map piece was given to the Oracle and the Oracle hid it in a chest in the dwarven mines. You will need a lobster pot, wizards' mind bomb, silk and an unfired bowl. Thelzar's map piece is with Wormbrain in one of the Port Sarim jails. For Melzar's maze, follow the instructions below.