From GameWatcher: “Dauntless’s Behemoths never rest, and they never stop dropping useful loot, such as the reagents, which you’ll never stop needing. It’s a vicious circle that, oddly enough, works quite well for the game’s economy. In any case, Charred Browplate is what we’ll give you info on here.
In order to find Dauntless Charred Browplate, you’re going to have to hunt down Hellions, and lots of them too. Everything you need to know, you’ll find down below.”
Source: N4G PC Dauntless Charred Browplate – Where to find it?