function Spell_Conditions takes nothing returns boolean
    return GetSpellAbilityId() == 'A000'
endfunction

function t1 takes nothing returns nothing
    local timer t = GetExpiredTimer()
    local unit u = LoadUnitHandle(udg_Hash, GetHandleId(t), 0)
    local real mana = GetUnitState(u, UNIT_STATE_MANA)
    local effect e
    set udg_i=udg_i+1
        if mana >= 10 then
            set udg_a = udg_a +1
            call SetUnitState(u, UNIT_STATE_MANA, (mana-10))
            call AddSpecialEffectTarget("Abilities\\Spells\\Undead\\FrostNova\\FrostNovaTarget.mdl", u, "overhead")
            set e = GetLastCreatedEffectBJ()
                if udg_a >1 then
                    call SetUnitAbilityLevel(u, 'A002', udg_a )
                    call SetUnitAbilityLevel(u, 'A004', udg_a )
                    else
                    call UnitAddAbility(u, 'A003')
                endif
        endif
        if udg_i > 9 then
            call UnitRemoveAbility(u, 'A003')
            call DestroyTimer(t)
            call FlushChildHashtable(udg_Hash, GetHandleId(t))
        endif
        call DestroyEffect(e)
        set t=null
        set e=null
endfunction

function Spell_Actions takes nothing returns nothing
    local timer t=CreateTimer()
    local unit u=GetTriggerUnit()
    set udg_a=0
    set udg_i=0
    call SaveUnitHandle(udg_Hash, GetHandleId(t), 0, u)
    call TimerStart(t, 1.00, true, function t1)
    
    set t=null
    set u=null
endfunction

function InitTrig_b takes nothing returns nothing
    local trigger t = CreateTrigger()
    call TriggerRegisterAnyUnitEventBJ( t, EVENT_PLAYER_UNIT_SPELL_CAST )
    call TriggerAddCondition(t, Condition(function Spell_Conditions))
    call TriggerAddAction( t, function Spell_Actions )
set t=null
endfunction