Warns you if there's a friendly raid member MCed near you. It tracks the Skeram MC and the Qiraji Mindslayer/Brainwasher MC.
There's 3 interaction range settings to choose from: Follow, Trade, and Inspect/Duel. Follow is the range that's furthest away from you, then Trade, and then Inspect/Duel.
You can change this option in the "Custom Options" tab.