I'm talking about these things https://wowpedia.fandom.com/wiki/Surge_needle
Surge needles are massive needles constructed of arcane energy. By opening the Focusing Iris with his own blood Malygos had been able to direct powerful surge needles, using them to pull arcane magic from Azeroth’s ley lines and channel that magic into the Nexus.[2]
The Twilight's Hammer used a surge needle to transfer magic from the Nexus into Chromatus, reviving him.[3] Arygos' life energy, the blood of a scion of Malygos,[4] was used to create a surge needle that channeled vast stores of arcane energy from the Nexus and into Chromatus's lifeless body, imbuing the abomination with life.[5]
They are needed to redirect energy, but I wonder if they can be used as weapons of mass destruction? Drain energy from the ley lines of Azeroth or from the Nexus (so as not to harm the planet) and shoot enemies with destructive rays of arcane magic. I think it would be interesting to see this, but for some reason they were not used for this. Malygos couldn't use them like that, or just didn't want to? I also think it would be amazing to see a dogfight between this thing and a Legion Ship, with the entire sky filled with the destructive power of Arcane and Fel.