Last on the list of Guardian-grade components is Sapphire Wire, another hard-to-come-by item formerly favored by Hunters because of its versatility. Sapphire Wire, like Plasteel Plating, was another casualty of the Red War… but you feel confident that you can scrounge some up. Gather Sapphire Wire by completing bounties for Ana Bray on Mars, by defeating Hunters in the Crucible, or by completing an Escalation Protocol wave. Escalation Protocol waves grant the most efficient progress.