Reanimated Giant

In order to summon the ensouled giant head, make your way to Arceuus by taking Veros in Port Sarim or teleport via fairy rings if you started Fairytale 2 quest. Once you get to Great Kourend, head north west to House Arceuus. At the library, just follow the fence around till you get to the level 21 skeletons. Continue east till you get Tyss at the Dark Altar. Speak with him and he will teach you the dark magic of necromancy. At this point, your spell will change and show all the necremancy spells. Just click on the giant head to cast the spell to reanimate the moss giant. The spell costs 1 soul, 2 natures, and 4 body runes to cast. When completed and you wish to revert to original spells, just speak to Tyss again. If I have missed something, please ad to this post.