According to in-game canon, the Zroni had a civil war between two factions. One of the factions decided to become the crisis, move to the Shroud and let the galaxy die. The other faction eventually became desperate and voluntarily sacrificed themselves in order to produce a sufficient amount of Zro to overpower the crisis. While Stellaris does feature Death Cult ritual sacrifices, however, there is not yet any that converts lives into philosopher's stones Zro.
There are several uses for Zro, which means that a Zro-producing sacrifice could be useful:
Ships: Psionic Shields
Starbases: Zroni Storm Caster
Decision: Extradimensional Experimentation
Edict: Sight Beyond Sight
Edict: Zro Addatives
Edict: Zro Catalysis
Death Cults that psionically ascend should gain a new sacrificial edict that produces Zro.
(Optionally, there could also be a new Zro-producing purge type for involuntary volunteers, perhaps even a new Zro-producing colossus effect that can be unlocked in some appropriate way. Possibly at the same time as the sacrifice, since these are essentially variants of the same concept.)
(Potential further uses of Zro could also include paying a price to force a successful - perhaps even a specific - Shroud outcome, or "constructing" Psionic Avatars, or turning more leaders into vanilla Chosen Ones, or turning hyperlanes into wormholes and/or creating wormholes and/or a megastructure that can create and redirect a single wormhole.)
There are several uses for Zro, which means that a Zro-producing sacrifice could be useful:
Ships: Psionic Shields
Starbases: Zroni Storm Caster
Decision: Extradimensional Experimentation
Edict: Sight Beyond Sight
Edict: Zro Addatives
Edict: Zro Catalysis
Death Cults that psionically ascend should gain a new sacrificial edict that produces Zro.
(Optionally, there could also be a new Zro-producing purge type for involuntary volunteers, perhaps even a new Zro-producing colossus effect that can be unlocked in some appropriate way. Possibly at the same time as the sacrifice, since these are essentially variants of the same concept.)
(Potential further uses of Zro could also include paying a price to force a successful - perhaps even a specific - Shroud outcome, or "constructing" Psionic Avatars, or turning more leaders into vanilla Chosen Ones, or turning hyperlanes into wormholes and/or creating wormholes and/or a megastructure that can create and redirect a single wormhole.)
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