Considering the new laws, and the very real difficulty of enforcing them against other PCs, I would suggest that it be made possible to hand in the blood of other PCs by House Nephezar Retainers for blood/prestige.
The collected blood could then be reflected in a non-withdrawable endless chest/display.
A PC's blood should also only be registrable once. This prevents abuse, as only the first donation is worth anything. This also rewards Retainers who are diligent.
The amount of Prestige/Gold could scale to the PC's level at the time at which the blood is handed in. I would propose a rate of level * 10. A level 3 PC would be worth 30 prestige/gold while a level 10 PC would be worth 100 prestige/gold.
The blood can also then be withdrawn with DM permission for certain IC rituals/ceremonies.
Quote from: in hoc signo vincesThe collected blood could then be reflected in a non-withdrawable endless chest/display.
I'd like to second at least the suggestion of some kind of storage or registry for these, for practical and logistical reasons!
Is a blood-only chest/receptacle with unlimited storage, maybe that rejects objects with names identical to ones it already contains, a possibility? I know the altar does something kind of similar, at least in terms of recognition, but we aren't using that currently for submissions under the new tithe.