Dawn of Civilization
The blasting rod is constructed of a four foot length of wood and metal, and carved with intricate symbols along its length. The Travellers have observer its use on several occasions, able to produce gouts of blue flame.
These artifacts are not actually enchanted, but serve as a targeting system to draw attention to someone or something in the future which can retroactively produce the effect in the past. The wielder “paints” their intended target by aiming the rod at them, and wiling the effect through a means not wholly understood by the Travellers.