Jeremiah's Quest


 * After obtaining the Cthonic Spark, Jeremiah can spawn in one of a few locations: Izalith poison swamp, Bed of Chaos room, or Vamos's room in Catacombs if you give Vamos the spark (not recommended, rest of this quest assumes he kills you in Izalith).
 * If he kills you, he steals your Cthonic Spark and your ability to warp. You have no choice but to "chase" him out of Lost Izalith.
 * If you kill him, his questline ends immediately and you get his drops.
 * Take the shortcut back to near Firesage's room, and go to the elevator up to Chaos Servants. Jeremiah takes it up before you can get on it.
 * When you take the elevator, if you saved the new daughter of chaos npc and she resides outside the covenant room, Jeremiah's items will be in front of her and his questline ends. Otherwise, Eingyi and Quelana's Sister will be dead, and Jeremiah moves on. NOTE: Due to a bug, Jeremiah killing Quelaag's sister counts as a sin for the Velka Pact Quest, thus breaking the pact. Make sure to not let this happen if you are doing Velka's Pact.
 * Proceed out of the Nursery into Blighttown. If Quelana lives (even if invisible), Jeremiah's loot will be in front of her.
 * If he kills you, and you don't find his loot in the Nursery or in front of Quelana, you can find his loot in the Seath's boss arena where you have to die (you must kill Seath before, or do the Havel's quest). You will get back also the Cthonic Spark.
 * Other progression routes unknown so far.