When fighting Elvarg, you should have two 4-dose strenght potion, and the rest lobster/anchovie Pizza. You should be wearing rune full helmet, rune chainmale and plate legs/skirt. Both skirt/legs protect the same. Don't use a scimitar, use a rune warhammer/battleaxe, cuz Elvarg's skin has a resistance to slashing. I heard that the rune stuff can be substituted by adamant, but I'm serious, addy won't help as much as rune. If you can't use rune, keep training until you can. If you can't find rune, there's a shop on the 2nd floor of the champions guild south of varrock. If you can't afford it, not my problem, make the cash! Also, be sure to have an anti-dragonbreath shield.
Non members CAN do the dragon slayer quest. That is how you get rune armor.
From the dragon slayer shop in /join lair
no its a quest
The Dragon Slayer helm was available for purchase with AC coins at one point.
Travel to Dragon Stone and talk to Galanoth. He has a shop that sells dragon slayer armor.
If you look at the Dragon Slayer quest in your quests tab, it should tell you all the recommendations that you will need, if it doesn't or they are lined out - it means that you are ready to start the quest.
Go to below link and go to non-member quest and find dragon slayer quest. It is a good guide with screenshots.
I gave a link for you.
you have to go to dragonstone.
Uh..........Dragon Slayer?
Yes, you can obtain the Corrupt DragonSlayer armor in AdventureQuest. It is dropped by the Dragonslayer General when you defeat him from the "Confrontation" quest chain.
Dragon Slayer is a member's only quest. Unless you are a member, it won't let you do the quest. If you are a member, try doing the other quests to see if you unlock it.