Rewrite the rule “Unlife” as follows:

If a Vampire Lord’s Puissance is 0, then that Vampire Lord is Dust. While a Vampire Lord is Dust, they may not spend Puissance, their Puissance is 0, and their Puissance cannot be raised above 0 except by means defined in this rule. If a Vampire Lord is not Dust, then that Vampire Lord is Revenant.

If a given Vampire Lord is Dust, any other Vampire Lord who is Revenant may, as a Power Action with a cost of 1, raise the Puissance of that Dust Vampire Lord to 3 and gain a Favour with that Dust Vampire Lord as its lender.