
Abilities
- INDOCTRINATION: At the start of a ground combat, you may spend 2 influence to replace 1 of your opponent's participating infantry with 1 infantry from your reinforcements.
- DEVOTION: After each space battle round, you may destroy 1 of your cruisers or destroyers in the active system to produce 1 hit and assign it to 1 of your opponent's ships in that system.
Promisorry Note(s)
Greyfire Mutagen
After a system is activated:
The Yin player cannot use faction abilities or faction technology during this tactical action.
Then, return this card to the Yin player.
Greyfire Mutagen Ω
At the start of a ground combat against 2 or more ground forces that are not controlled by the Yin player:
Replace 1 of your opponent's infantry with 1 infantry from your reinforcements.
Then, return this card to the Yin player.
(Ω) refers to an updated version of the promissory note, released with the Codex, found here
Technologies
Impulse Core
At the start of a space combat, you may destroy 1 of your cruisers or destroyers in the active system to produce 1 hit against your opponent's ships; that hit must be assigned by your opponent to 1 of their non-fighter ships, if able.
Prerequisites:
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Yin Spinner
After 1 or more of your units use PRODUCTION, place 1 infantry from your reinforcements on a planet you control in that system.
Prerequisites:
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Yin Spinner Ω
After you produce units, place up to 2 infantry from your reinforcements on any planet you control or in any space area that contains 1 or more of your ships.
Prerequisites:
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(Ω) indicates omega tech introduced in the first volume of the Twilight Imperium Codex found here.
Breakthrough
When you gain this card or score a public objective, gain the alliance ability of a random, unused faction.
Flagship
| Name | Cost | Combat | Move | Capacity | Abilities |
|---|---|---|---|---|---|
| Van Hauge | 8 | 9 (x2) | 1 | 3 | Sustain Damage
When this ship is destroyed, destroy all ships in this system. |
Mech
Sustain Damage
Leaders

You may exhaust this card; if you do, that player may place up to 2 fighters from their reinforcements in that unit's system.
You may exhaust this card to allow that player to place 2 fighters in the destroyed unit's system if it was a ship, or 2 infantry on its planet if it was a ground force.
You may exhaust this card to allow that player to place 2 fighters in the destroyed unit's system if it was a ship, or 2 infantry on its planet if it was a ground force.

You may produce 1 additional infantry for their cost. These infantry do not count against your production limit.
When you research a technology owned by another player, you may return 1 of your infantry to reinforcements to ignore its prerequisites.
When you research technology owned by another player, you may return 1 of your infantry to reinforcements to ignore all prerequisites.

ACTION: For each planet that contains any number of your infantry, either ready that planet or place an equal number of infantry from your reinforcements on that planet. Then, purge this card.
ACTION: Commit up to 3 infantry from your reinforcements to any non-home planets and resolve invasions on those planets; players cannot use SPACE CANNON against those units.
Then, purge this card.
ACTION: Commit up to 3 infantry from your reinforcements to any non-home planets and resolve ground combats on those planets; players cannot use SPACE CANNON against these units.
Then, purge this card.
(Ω) refers to an updated version of the promissory note, released with the Codex, found here
FAQ
Q: Does the Yin Brotherhood agent, Brother Milor, keep combat going after the last ship is destroyed?
A: Yes.
Q: Can the Yin Brotherhood commander, Brother Omar, or the Naalu Collective commander, M’aban, allow the player to choose to produce only 1 infantry/fighter and then another with their commander?
A: Yes, both of these commanders allow the player to choose to only build a single fighter/infantry for 1 resource and gain an additional unit of that type each time they do.
Q: Does a destroyer use its anti-fighter barrage ability before it is destroyed by the Impulse core technology?
A: No. "Start of Combat" abilities occur before the Anti-fighter barrage step.
Q: The Yin Brotherhood hero, Quantum Dissemination Omega, says to "resolve invasions" on those planets. Does this allow for using Parley, committing additional ground forces, and using bombardment? Should this be ground combats?
A: The Yin hero, Quantum Dissemination Omega, should indicate to resolve ground combats on those planets, not full invasion steps. Parley can be played on one of the planets.
Q: Can the Yin Brotherhood Agent, Brother Milor Omega, be used during the Agenda Phase?
A: Brother Milor Omega can only be used during the action phase.
Q: What is the interaction between the Yin Brotherhood agent, Brother Milor Omega, and the Nekro Virus and Naalu Collective flagship abilities?
A: The units participating in combat via these flagship abilities are both a ground force and ship during combat. The owner of the unit can choose whether to place 2 infantry or 2 fighters when using Brother Milor Omega, however units placed this way can only continue to participate in space combat if fighters are placed, and can only continue to participate in ground combat if infantry are placed

