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

Guild Agents

Yssaril Infantry

After you move this unit into a system that contains another player's units, you may look at that player's action cards and take 1 of them.
Yssaril Tribes originUnit upgrade – Infantry

Infantry

After you move this unit into a system that contains another player's units, you may look at that player's action cards and take 1 of them.

1 (×2)cost
7combat
1in the deck
–chance to draw

Source: Twilight's Fall