How do I add/remove/move around abilities via triggers?

[Togrias]

I.e. remember games like spellcraft/custom arena where you get to pick abilities for heroes?

My first impression check of the map editor suggests that the command card of each unit is fixed and cannot be amended by triggers... you can enable or disable individual buttons but cannot swap them out with another. Or is there a way?

I don't wanna create one hero for every ability combination possible...

 

[SwedishChef]

I also wonder this. Can you add abilities to units/heroes in game?

 

[Dave312]

You may be able to use the catalogue function to add abilities to a unit during a game. I have not attempted this so it might not be possible. Alternatively you could add every ability to the unit and then enable/disable the ones you need.