Twilight's Fall – a separate game. Twilight Imperium's expansions, mods and rules topics are not part of it.

Nexus

After each round of space combat in this system, place 1 fighter from your reinforcements in this system.
Mirveda ProtectorateUnit – Ship – Flagship

Flagship

After each round of space combat in this system, place 1 fighter from your reinforcements in this system.

SUSTAIN DAMAGE

8cost
9 (×2)combat
1move
3capacity

Source: Discordant Stars