Is it possible to change the availability of an upgrade with triggers? My idea was to make it possible for a player to choose to which unit he would like to upgrade a certain unit (like the Berserk upgrade). Example: The basic unit is a Sorceress. And now you can choose whether you'd like to upgrade her to a Whitch (adds some more spells) or a Summoner (able to summon various units).
it should be possible, For instance you set up a dialoge, witch concludes a few buttons including the upgrade for with unit should be made. If clicked you set with a trigger that an upgrade has been finnished. It is possible.
