struct TickingBomb
    unit caster
    unit target
    timer t

    method Explode takes nothing returns nothing
        local TickingBomb d = GetTimerData(GetExpiredTimer())

        call UnitDamageTarget(...)
        call d.destroy()
    endmethod

    method onCast takes nothing returns nothing
        local TickingBomb d = TickingBomb.create()
        set .caster = GetTriggerUnit()
        set .target = GetSpellTargetUnit()

        set .t = NewTimer()
        call SetTimerData(.t, d)
        call TimerStart(.t, 3., false, function Explode)
    endmethod

    private static method onInit takes nothing returns nothing
        local trigger t = CreateTrigger()
        call TriggerAddCondition(GT_RegisterStartsEffectEvent(CreateTrigger(), TICKING_BOMB), Condition(function onCast))
    endfunction

endstruct