As you may know, level 31+ magic is required in order to cast telekinetic grab on one of the map pieces for Dragon Slayer. However, these map pieces were once tradable during Runescape Classic, which meant a pure could buy the map piece and kill Elvarg without getting the necessary magic level in the future. The only way to get the map piece was during the Beta version of Runescape 2, when a player could transfer his/her items from Runescape Classic. This made it possible for someone to transfer the map piece that was meant to be dropped by Wormbrain, the goblin. Since the Beta version of Runescape 2 was only temporary, only a few pures that have a rune platebody are left.