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

Collider

At the start of invasion, if this unit is in the space area of the active system, you may remove this unit from the game board to destroy 1 unit on a planet in that system.
Zelian PurifierUnit – Ground Force – Mech

Mech

At the start of invasion, if this unit is in the space area of the active system, you may remove this unit from the game board to destroy 1 unit on a planet in that system.

SUSTAIN DAMAGE

2cost
6combat

Source: Discordant Stars