Vamparc ribbon

The vamparc ribbon is a weapon invented by Jhiaxus. Though they use up a lot of energy, what makes vamparcs special is their ability to drain energon straight from an enemy Transformer's body and use it as ammunition. They may overload if they're not fired quickly enough.

Fiction

IDW Generation 1 comics

With Cybertron low on energon and resistance to the Senate growing, Zeta Prime made the decision to employ vamparc ribbons in his fight against those who opposed him. The Senate thought he was going overboard, but he didn't care and had already begun testing them out on insurgents in the city of Nyon. Parasites Zeta went on to equip the giant Omega Destructors with industrial-size vamparc ribbons which they used in an all-out assault on Nyon's citizens. He wielded one of the weapons himself during the attack, using it to defeat Orion Pax and his unit when they turned on him. Purge