From GameWatcher: “Anthem, the latest game from BioWare, is out now – and it’s got some weird challenges mixed in with the fun loot-drop stuff. At some point to progress you’ll need to get Anthem Multi Kills, and here’s the thing, the game doesn’t tell you how to get multi kills in Anthem.”
Source: N4G PC Anthem Multi-Kills – How to Get Multi Kills in Anthem for Tomb of Cariff Challenge