Havel's Quest


 * Before going to Duke's Archives, either find the Crossbreed Dagger at the bottom of Sen's or kill Priscilla for her Soul. (must have dagger if doing velka pact).
 * Upon dying to Seath, he sees the remnant of the crossbreed and flees in guilt, abandoning his soul fragment.
 * If you use the dagger and don't have the soul, you'll have to hit Seath with it once in the second fight instead, after doing the Havel part of the quest. If you have both the soul and dagger, you will still need to hit Seath once.
 * Havel is locked away in the prison tower of the Duke's Archives.
 * Fetch the key to his cell on one of the gears in the center of the room.
 * Free him, and let him walk to the ladder.
 * When he's standing at the ladder, open the door at the top, and he'll climb up and teleport out.
 * In Seath's boss arena, you will find his soul fragment and no fight if you die to him with Priscilla's Soul earlier. If using the dagger, you have to enter the fight and just hit him with it once. Either way you'll get the Moonlight Greatsword too as if you had cut his tail.
 * Head down to Ash Lake, where you may see Havel and Seath near the Everlasting Dragon. Reload the area until they are both gone and Havel's drops litter the ground.