Behold White Bull timing

When does timing of White bulls shootout action occur?

Shootout Tau Technique, Boot: Increase the casualties of both posses this round by this dude’s influence. Your opponent may send all dues in their posse home booted. If they do, this dude permanently gets +2 control points and unboots.

If i, let’s say, play Great Sage after i play White Bull, will the +influence count towards the increase of casualties or does the add on casualties from white bull trigger when i play white bull?

Cards resolve using the values when played, you don’t go back and recalculate.

Being looked at by RT.