function Block_Damage takes nothing returns nothing
    local timer t = GetExpiredTimer()
    local integer id = GetHandleId(t)
    call SetUnitInvulnerable(LoadUnitHandle(h, id, 0), false)
    call PauseTimer(t)
    call DestroyTimer(t)
    call FlushChildHashtable(h, id)
    set t = null
endfunction


function TakesDamge takes nothing returns nothing
    local timer t = CreateTimer()
    local int id = GetHandleId(t)
    local unit u = GetTriggerUnit()
    call SetUnitInvulnerable(u, true)
    call SaveUnitHandle(h, id, 0, u)
    call TimerStart(t, 0, false, function Block_Damage)
    set u = null
    set t = null 
endfunction