Триггерное нанесение урона только врагам

    globals 
        unit ForFilter1
    endglobals
    
    function EnemiesFilter takes nothing returns boolean
        return (IsUnitEnemy(GetFilterUnit(), GetOwningPlayer(ForFilter1)) and GetHp(GetFilterUnit()) > 0.045 and GetUnitAbilityLevel(GetFilterUnit(), 'Avul') == 0)
    endfunction


    function DamageUnitsInRange takes unit source, real x, real y, real range, real damage, attacktype at, int filter_type returns nothing
        local unit victim
        local group g = CreateGroup()
            if filter_type == 1 then 
                call GroupEnumUnitsInRange(g, x, y, range, Filter(function AllFilter)) 
            elseif filter_type == 2 then 
                set ForFilter1 = source 
                call GroupEnumUnitsInRange(g, x, y, range, Filter(function EnemiesFilter)) 
            endif
                loop
                exitwhen FirstOfGroup(g) == null
                    set victim = FirstOfGroup(g)
                    call UnitDamageTarget(source, victim, damage, true, false, at, DAMAGE_TYPE_NORMAL, WEAPON_TYPE_WHOKNOWS)
                    call GroupRemoveUnit(g, victim)
                endloop
            call GroupClear(g)
            call DestroyGroup(g)
        set g = null
        set victim = null
    endfunction

if IsUnitEnemy (u, p) then
//много кода
endif
//u - твой выбранный юнит, р - владелец юнита кастера