In Elden Ring, you’ll find a wide range of characters that will share their plight with you, most of these will have Quests that span multiple locations. This page will detail where you can find Tanith and complete her Questline.
First Meeting - Volcano Manor
Lady Tanith’s Quest is a strange one, as although it’s completely optional, it’s also the easiest way to progress through this legacy dungeon. Do note however that you’ll want to avoid the final step of this Quest until you’ve finished all your other business here as completing that will alter the state of Volcano Manor and cause them to end. With that in mind, you’ll find the Volcano Manor in Mt. Gelmir, Altus Plateau and the easiest way to reach it is to have Tanith’s scout, Rya, transport you there from the top of the Grand Lift of Dectus. If you’ve yet to meet Rya, then you’ll need to head to Mt. Gelmir to the northwest of the Altus Plateau.
Once there, speak with her near the Volcano Manor Site of Grace and she’ll give you a rundown on what the Volcano Manor, and the Recusants, are all about. Agree to join the manor and she’ll hand over the Drawing-Room Key needed to access a room down the western corridor. Inside, you’ll find a host of characters such as Knight Bernahl, Rya, and possibly Diallos. Patches can also be located near the entrance of the Volcano Manor and all of these characters have Quests that you should finish all of their Volcano Manor related steps before the final assassination contract.
Take a look on the dining table here, and you’ll obtain the Recusant Finger and the Letter from Volcano Manor, this will detail the location of your first target (which will be marked on the map). This first contract takes you back to Limgrave, where you must slay Old Knight Istvan, you’ll find the sign to invade him just north of the Warmaster’s Shack, under the bridge, in Stormhill and you’ll obtain the Scaled Set upon his defeat.
Second Meeting - Volcano Manor
Return to Volcano Manor and speak with Tanith to report news of your success and she will hand over the Magma Shot Sorcery. Return to the drawing-room and you’ll find the next Letter from Volcano Manor on the table. Be sure to take the time to progress any other character’s Quest before you head out on your next assassination contract. This time, you’ll need to make your way to where the Shaded Castle is in the north of Volcano Manor and head south to find the sign to invade Rileigh the Idle who will drop the Crepus’s Vial Talisman.
Third Meeting - Volcano Manor
Once again, return to Volcano Manor and deliver the news to Tanith to obtain the Serpentbone Blade, a Katana that inflicts deadly poison. Return to the drawing-room again and this time, you’ll find a Red Letter on the table, this is the final assassination contract and completion of it and speaking with Tanith upon it will proceed to the boss of this legacy dungeon.
Your final target is in the Mountaintops of the Giants, so you’ll need to finish the events in the Leyndell, Royal Capital legacy dungeon before you gain access. Once there, make your way to the Ancient Snow Valley Ruins Site of Grace and head northeast to hit the frozen stream. From there, head west and you’ll reach Shack of the Lofty where you can find a red invasion sign to fight Juno Hoslow, Knight of Blood. You’ll obtain the Hoslow’s Oath gesture at the start of the battle and upon his defeat, the Hoslow’s Set and Hoslow’s Petal Whip.
Fourth Meeting - Volcano Manor
Be sure that you’ve completed all necessary steps from characters in the Volcano Manor and then return to Tanith to report your success once more to obtain the Taker’s Cameo Talisman, this will restore HP as you defeat enemies. At this point, Tanith asks if you wish to meet her Lord and accepting this will transport you directly to the room to challenge Rykard, Lord of Blasphemy.
Defeating him will cause all of the characters in the Volcano Manor to move on, so ensure your business is concluded here before the battle. Return to Tanith after the battle and then return to the Rykard, Lord of Blasphemy Site of Grace to find Tanith now feasting on the remains of her lord.
Tanith will remain here now, although you do have the option of killing her to obtain the Consort’s Set although be aware that her Crucible Knight will appear and attack. Defeat the knight however, and you’ll obtain the Aspect of the Crucible: Breath Incantation.