All In The Family is a Quest in Divinity: Original Sin II.
A scrap of paper tells of a strange object that drove Johanna Surrey to madness. The numbers 2, 1, and 3 were scribbled in the margins.
Tarquin asked us to retrieve the powerful artefact from the Surrey family crypt.
- Find the first artefact.
- Find the second artefact Artifact.
- Take the two artefacts to Tarquin
At the gate of Stonegarden in Reaper's Coast, Tarquin asks you to investigate a family crypt and retrieve something for him. You can get the key from a petrified sourceress, Qanna found in the crypt guarded by the hound (the crypt is close to and directly north of the family crypt and is flanked by two knight statues). Cast Armor of Frost, or Bless on her inside the crypt to depetrify her and she will talk to you. If you fight with her she will spawn undead minions, but kill her and they will disappear so just focus her down. Note that she CAN be damaged (and even killed) while she is petrified, so if you want to talk to her, you can take her down to a sliver of health, talk, and then un-petrify. A single Marksman's Fang will ignore the armor and likely kill her.
Next head to the family crypt and open the door. In the first room of the family crypt, there are two buttons on the wall, you need to get close to find them. Press these the buttons to open the stone gate.
Cast Spirit Vision (Learned in Powerful Awakening), you will see three levers on the wall in the second room with the sarcophagus. Have a party member stand on the pressure plate in the third room, then press the levers (middle-left-right) to reveal a secret hatch. If you have already touched the levers since stepping on the plate, in some other order, then you need to "reset" the middle lever. Pull the middle lever until water comes out, then do left, then do right.
There's a treasury under that hatch, use your character with highest lucky charm to loot them. The artefact is in the sarcophagus, if your character is a lizard, he/she will recognize the language of demons.
When you try to leave the tomb, all clay sentinels will revive and attack you.
The fight can be avoided by fast traveling to the Stonegarden waypoint.
Report to Tarquin, he will tell you the other pieces of artefact is on Bloodmoon Island.
When you travel to the Bloodmoon Island, you can find a hatch on its northeast corner, you need 22 wit (use Peace of Mind skill to boost your wits by 9 points) to spot it buried:
Inside the vault is the other half of the artefact.
When you have both halves of the artifact, talk to Tarquin. (Sometimes he is not at the gate of Stonegarden, you can find him on The Lady Vengeance, near the boat. If you travel to The Lady Vengeance by waypoint, he's right next to you.)
If you give Tarquin the pieces, he will repair it at ACT IV (The Arx), it's arguably the best two-hand weapon in the game. (Sadly, only 1 durability)
- Focus on killing the two Clay Sentinals at the top of the steps (one on either side of the sarcophagus) to avoid them reanimating already killed Clay Sentinals.
- If Tarquin is missing for you, one possible solution is to travel to The Lady Vengeance waypoint, take the rowboat on the side to shore, then take the rowboat back to The Lady Vengeance. Tarquin should be standing next to the rowboat at this point.
- If Tarquin doesn't show up at the graveyard at all you might have played too far ahead in Reaper's Coast. Try loading a save just after arriving in the area and head straight for the graveyard through the Paladin Bridgehead. You can get the quest and then continue on wherever you want.
- You can use other silver items (Silver Glass) to produce the Silver Lever Shaft on the Ancient Forge at the Bloodmoon Island.
- There's a glowing chest inside the crypt where you get the second artefact piece, "unusual blade". Make sure to lockpick then open it, it has the green Teleporter Pyramid in it!
- Right behind the glowing chest, there is a chest hidden in the crack between the destroyed bridge and the floor beneath it. You can use Teleportation to see it glowing yellow. You need a certain angle to reach it with teleport or you can use Apportion