Hi, for my TD I'm doing the following: However when I add an ability to a unit and set it's level, I will always get a lag THE FIRST TIME THE EVENT HAPPENS. So actually I have a few triggers that work in a similiar way and have the same problem. Do you know the problem? The thing is, actually the trigger is very useful to have some sort of an ID for the unit, I can't use custom value as it is used already and I can't use flying height as I'm also targeting flying units. Refering to this trigger i'm checking in other events if a unit has the given ability and do actions depending on the level of that ability. I could directly add the unit to a unit group, but then - how do I solve the problem with the needed additional ID?