B · Engine & Sequencing · §10
Four places where the printed wording decides the play.
Pre Vizsla defeats any number of non-leader units with a total of six or less remaining HP. Damage already marked counts, so a board that has been through a combat round is worth more to Vizsla than a fresh one. Count before you play him.
Take control of a non-leader unit, then defeat it. The unit is yours at the moment it dies, so anything asking whether a friendly unit was defeated this phase is satisfied: Koska Reeves makes her token off their card.
Choose an aspect; each enemy unit with that aspect gets -2/-2 for the phase. The choice is made when it resolves and again on every attack, not once when you build the deck. Against a board built from neutral cards it catches nothing, because a card with no aspect icons belongs to no aspect.
Defeat all space units. Yours included. It is in 33% of the 197-list field sample, so it is also a card being pointed at you.