Undraw: Increases damage done by the caster by 25% for 30 seconds.
I'm sure this would end up being some kind of newb trap, but it could be useful for AST in things like Deep Dungeons and solo instances...and it's not like people are using the button for anything right now!
Not sure how much it would need to be, but the idea would be where AST could, by Undrawing all cards, make itself roughly damage equal to WHM or SGE, while still being a damage loss vs using the cards on DPS party members.
Anyway, it was just a REALLY random idea I had while reading other people's comments about stuff on Reddit and the FFXIV Job Guide page. I'm sure it would be a terrible idea for all kinds of reasons, but...I dunno. /shrug