Limit multiple selections of a custom racial ability?

[TCArknight]

I have a couple of Custom Racial abilities that are selected through a configurable. One of these can be selected a maximum of three times, with minimum levels of 5,10 and 15 for first, second and third selections.

Is there a simple way with an prereq or eval rule to enforce these selections and grey out the choice on the selector?

 

[AndrewD2]

Hmm, I had to do this before and I need to do it again, let me see what I can find.

 

[AndrewD2]

Looks like what I used was a pre-req like Improved Natural Armor which was you could take it for every 5 summoner levels and is this code

        var allowed as number
        if (ishero = 0) then
          allowed = round(parent.field[xAllLev].value/5,0,-1) + 1
        elseif (isminion <> 0) then
          allowed = round(herofield[tCompLevel].value/5,0,-1) + 1
          endif

        ~ if we're a pick, then there must be complevel/5 or fewer copies of
        ~ this ability
        if (@ispick <> 0) then
          validif (tagcount[HasAbility.rcEiNatArm] <= allowed)

        ~ otherwise, look for fewer, since we're adding this
        else
          validif (tagcount[HasAbility.rcEiNatArm] < allowed)
          endif

        @message = "You may not have more than " & allowed & " copies of this ability."