Событие - Юнит приводит способность в действие
Условие - (Ability being cast) равно (Бафф-пустышка)
Действия - Боевая единица - Add ability (...)
                запускаем таймер на N+0.01 секунд

Событие - Время таймера истекло
Действия - 
If UNIT HAS BUFF (...) then DoNothing() else Боевая единица - Remove ability (...) endif

function B_Conditions takes nothing returns boolean
    return GetSpellAbilityId() == 'A001' 
endfunction

function H2I takes handle h returns integer
    return h
    return 0
endfunction

function I2U takes integer i returns unit
 return i
 return null
endfunction

function get_object_iparam takes handle h, string key returns integer
 return GetStoredInteger(udg_cache, I2S(H2I(h)), key)
endfunction
function set_object_iparam takes handle h, string key, integer val returns nothing
 call StoreInteger(udg_cache, I2S(H2I(h)), key, val)
endfunction

function flush_object takes handle h returns nothing
 call FlushStoredMission(udg_cache, I2S(H2I(h)))
endfunction

function Go takes nothing returns nothing
    local timer t = GetExpiredTimer()
    local unit target = I2U(get_object_iparam(t,"target"))
       if GetUnitAbilityLevel(target,'B000')<1 then
         call UnitRemoveAbility( target, 'A002' )
         call DestroyTimer(t)
         call flush_object(t)
       else 
         call DestroyTimer(t)
         call flush_object(t)
       endif
    set t = null
    set target = null
endfunction

function B_Actions takes nothing returns nothing
    local timer t = CreateTimer()
    local unit target = GetSpellTargetUnit()
    local integer l = GetUnitAbilityLevel(GetSpellAbilityUnit(), 'A001' )
    call SetPlayerAbilityAvailable( GetOwningPlayer(GetSpellAbilityUnit()), 'A002', false )
    call UnitAddAbility( target, 'A002' )
    call SetUnitAbilityLevel(target, 'A002', l )
    call set_object_iparam(t,"target", H2I(target))
    call TimerStart(t,20.01,false, function Go)
    set t = null
    set target = null
endfunction

//===========================================================================
function InitTrig_BlessingJass takes nothing returns nothing
    set gg_trg_BlessingJass = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( gg_trg_BlessingJass, EVENT_PLAYER_UNIT_SPELL_EFFECT )
    call TriggerAddCondition( gg_trg_BlessingJass, Condition( function B_Conditions ) )
    call TriggerAddAction( gg_trg_BlessingJass, function B_Actions )
endfunction