OSRS Dragon Slayer RuneScape Guide

The ability to outfit dragon platebody as well as rune platebody

The Dragon Slayer quest requires you to defeat the Elvarg dragon from Crandor Island. On completion, the players will gain the ability to use the rune platebody.
Rewards for Completing the Quest:

The ability to outfit dragon platebody as well as rune platebody
18,650 defense experience.
18,650 strength experience.
2 Quest points.
Access to Crandor
Quest:

Ask the guild master to give you an assignment. He will inform you that you must visit Oziach. He will then give you the quest. On complete the quest, you'll be granted the legendary rune platebody. He lives on the edge of Edgeville at the edge of a cliff.
You can transfer to Edgeville, and then enter the home of Oziach. Inform Oziach that the Guild master requested you get runeplate from Oziach. You will be denied it, so tell him you are coming here to complete a mission. Oziach will say that he can give it to you in the event that you kill the dragon from Crandor.
Tell the guildmaster that Oziach has given you a mission to complete the destruction of the dragon of Crandor. The Guildmaster will tell you that long ago one of the adventurers of Crandor went down into the volcano and awakened the dragon Elvarg. Find out how to reach Crandor. He will tell you that three pieces of map belong to three survivors of Crandor. The map of Melzar is located in a castle that is close to Crandorian refugee camps. Thalzar left the map piece in his tomb. Lozar's map may be located in Goblin village. The guildmaster will hand you keys.
The Crandorian refugee camp up the hill. Ask Oracle if you are seeking Crandor maps. He will reply that you could discover a map hidden behind the door that is below.
Look for the door at the lowest point of the hill. When you open the door, you will find a box of chest. To get the map, you must open it.
To buy a ship you must go to Port Sarim. Klarence, who is selling his boats will be at the port. He will tell you that the ship needs work in order to be able to flot freely to the waters. The cost is 200 gold. You can get a ship for 200 gold by paying the man.
Go to Wormbrain's cell and inform him that you would like the map. Wormbrain will ask for 10,000 coins to buy the map. Don't give him money to purchase the map. Wormbrain will be delighted and will appreciate the coins.
To get the keys, go towards Melzar's Maze. Take out the ghost, zombie rat and Skeletons. The keys will allow you unlock the maze's entrances. Open up the doors and then move on towards Lesser demon to kill him . You will also take one more key. This key will enable you to unlock the door to the chest. Find the map piece, and join it with the two other pieces. This map will take you to Crandor.
You've completed the work on the ship. Ned will request that you transfer the vessel to Crandor. Ned will drive you to Crandor. He will give you the map. Return to port Sarim to begin your journey with Ned.
When you get closer to Crandor it will be extremely severe. The dragon will attack your ship, and it will crash into you. After that, you'll be on a sandy beach. There are many dangerous creatures in this area. Find the way to reach the underground dungeons. Dragon Elvarg is there. You can kill the dragon and bring his head back with your.
You are able to teleport back to Oziach, and show him the head of the dragon you killed. You will receive the rewards you want.