You can kill Green Dragons north of the Graveyard in the Wilderness from Bestmengqin's blog

The best way to get started is to OSRS Buy Gold begin questing, just like the majority of techniques. Simple tasks like The Restless Ghost, Priest in Peril, Holy Grail, and Recruitment Drive will help you master the fundamentals of Prayer technique. At this point, you will have to depend on the farming of bones for higher grades of prayer.

A reliable source of Prayer income from experience lies in Dragon Killing. The bones they possess provide considerable knowledge and experience, and they don't require the highest level of skill. 

To eliminate Blue Dragons below the Taverley in Taverley Dungeon you won't need much resources as they can be killed from a safe location. If you decide to do this, be sure to do it with Magic as they are weak to this particular form of combat. Utilize giant eggs, rocks and columns to get Dragon stuck, and then complete them by casting your spells.

Additionally, you can kill Green Dragons north of the Graveyard in the Wilderness. Bring an Anti-Dragon Shield, food and equipment. Don't take anything too precious to avoid losing the money you have invested in Player Killers. 

You could also think about farming the area for Buy OSRS Accounts Void Knight Equipment because you're not likely to lose it being killed in low Wilderness. It is an excellent piece of equipment to use that is ideal for Dragon Killing and a safe one to wear in this region.