Enter the storeroom at Cysael Harbor, then go to the attached courtyard on the right. You can find two Legionnaires and a charmed female Orc at coordinates X272, Y75. Tell the Legionnaires to spare the Orc's life, then return later.
After destroying Boreas' elemental staff, you will get an item that is be used to release Icara, the White Witch, from her prison in Hiberheim.
Get the elemental staff dropped by Boreas in the western "castle" in Hiberheim. Then dropping it in the Forge where you met the Conduit to destroy it.
Go inside the Lighthouse at Cysael. Go down the trapdoor to meet Samson and get the "Lost Love at the Lighthouse" quest. He will tell you the story of his lost love, Desdemona. Go to Black Cove, west past the Cysael Harbor gate, and find her at the end of the Cove dungeon.
During Act II, Homestead will be hit by meteorites. Enter the Void Demon temple at the far northwest part of Luculla region in an area surrounded by lava. Destroy the overgrown Blood Stone at the rear of the temple. Because the demons in the temple are invincible, you must use someone that can sneak or become invisible to accomplish this.
Use the forest spirit's rune to enter the Source Temple at the center of the Phantom Forest.
After freeing Icara return to the Shelter plane and talk to her again next to the tapestry.
Find Evelyn in her secret hideout and kill her. You can now talk to Zombie Jake.
Meet the Conduit in the northernmost building filled with lava at Hiberheim.
Find the set of four elemental demon statues guarding the entrance to a cave near the top of the Cysael map (not far from Evelyn's hideout). Activate each statue by using a spell of the same element, then destroy the activated elemental.