You must get the Leyrivo's lamp in the basement of ghedahre church(in the north of Halloween hills, turn left when you enter Halloween Hills, then go North),make sure You had buy some goods from the trader in wildwoods traven, you can get some info there. Vamps is in Ghedahre too. Then you must find hippie Vampire(two vampire
children from the northwestern part of Ghed‘ahre). they will ask you to get Elephant Garlic.To get the Elephant Garlic, first return to the cave entrance you entered Halloween Hills and then head east. Dig the only grave thereand you‘ll get the Elephant Garlic. Give it back to the vipie vampires and you‘ll get Vampire Ash. It is necessary to light
the Leyrvo Lamp which is an important item to save the druid
frozen in this area.
you need a Shovel to finish the quest. You'll get the shovel from a witch that had been cursed. Her name is Gretchen. You must make her ugly again(she's cursed to be very beauty, and she hate it), You can find the Stinkot root, in the chest near Ghedahre, do your best to find it, or you can't get a shovel, If you can't find it, then search all chest in Halloween hills. All I remember, I go up a ladder near Ghedahre enterance(Just go east from the Mule express), to get the chest with stinkort root inside it. After you give the stinkort toot to her, then she will ask you to give a mysterius gift to Hilda(she is the first witch you saw when you enter New witchwood). give the gift to Hilda and she will cursed to be a toad. then go back to Gretchen, and she will give you a shovel.
To find the stinkrot root for Gretchen:
Quoted from RenZ:
"When you enter Halloween Hills, go East then take the 1st North path up. Then keep going East, you'll see a stairs then a go up. Go East again and in a treasure chest there's the stinkrot root. When you get the shovel, take the same path again but this time dun go up the stairs and you'll reach Sword of Chaos buried underground"