The ability to bind to another via blood oath has been introduced to the city by Anthony at Requiem of Hades. Available only at Walrus and 41st, this process costs 50,000 coins. Once you've got the coin on hand and both parties are present, you can request the blood oath ritual.
The Spectre holds both your arms as you feel a sensation transfer between you. You black out for a moment as the ritual is completed. You now feel a connection of closeness as their blood mixes and runs through your veins. A small mark is formed on the skin of your arm, the mark of XXX, showing the solidarity of your new Blood Oath.
While both parties must be present, the other party does not have to consent to the oathing (don't stick around that building if you've got stalkers!) Blood Oaths are not automatically reciprocal: the process can be carried out unilaterally and oathing to multiple people is permitted (up to a max of THUS FAR UNKNOWN - highest: 2). Information on blood oaths is discernible using Second Sight.
There is no benefit to the process; scrolls of succour/bondage cannot be used to join/pull a blood oathed partner. Unlike in the Halls of Binding/Severance, you can be robbed in the Requiem of Hades. Furthermore, there is no way to break these blood oaths, so ritual carefully *updated Sept 6 + 13, see update below.
Thanks to Hells Gate and anonymous for testing help!
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Update September 6 2020:
- You may now release someone who has oath bound to you at the Hall of Severance. There is no consequence to either party for this action.
- Coming soon: the ability to break an oath to someone, at high cost. Details TBD.
- A blood oath can now be broken at the Hall of Severance at the cost of 20,000 pints (or all blood if you have under 20k)