Shadow of the Storm/Quick guide

Starting out

 * Talk to Father Reen south of Al Kharid bank.
 * Talk to Father Badden in Uzer.
 * Pick and grind a black mushroom and dye Silverlight black. (You can find some beside the staircase)
 * Go down the stairs and talk to Evil Dave wearing your 3 black items and your dyed Silverlight.

Ritual

 * Talk to Denath.
 * Talk to Jennifer to get a demonic sigil mould.
 * Talk to Matthew.
 * Go to any furnace and smelt a demonic sigil. Your black outfit can be discarded at this point and replaced with combat gear.
 * Talk to the clay golem outside about last night.
 * Search the nearby kilns for a book.
 * Read the book, and talk to Matthew.
 * Go to North to talk to Denath and write down the incantation he tells you.
 * Complete the circle and click the sigil to chant the incantation.
 * Be sure to take the sigil from the floor, or you will have to make a new one at a furnace.
 * Exit the portal and take Tanya's sigil.
 * Tell Evil Dave to return to the lair - you should have 4 sigils now.

Rallying the troops

 * Convince Father Badden and Father Reen to join the ritual.
 * Talk to the golem, he will refuse to help.
 * Go down the stairs and take the Strange implement from the floor.
 * Use the implement on the golem, he'll now agree to help.

The final fight

 * Talk to Matthew to start the incantation, say it backwards.
 * Kill the demon with silverlight.
 * Equip darklight and choose your reward.
 * Quest complete!