Normal spellbook and runes to cast all 4 elemental blast spellsat least once. The blast spells must damage the demon, therefore bringing extra runes is advised due to the possibility of a spell splashing.
Activated lodestones in Al Kharid, Ardougne, Edgeville, Falador and Varrock
Run north to the Al Kharid mine, talk to Avan. (2)…
Go to the Dwarven Mine under Ice Mountain and north-east of the Falador lodestone. Climb down the ladder into the mine. Head south-west of the general store, talk to Boot. Boot is labelled on the World Map of the mine. (1)…
East of Ardougne in Witchaven there are some old ruins. Climb down the ruins.
Logging out will reset this puzzle.
Run north and pull the lever next to the door.
Run into the southern room and pull the lever.
Run back to the northern wall and pull the lever.
Enter the northern room and pull the lever.
Leave the room and pull the lever on the northern wall.