Middle Earth: Shadow of Mordor - A New Master - Brand a Captain while in combat. [Bronze / 15G]

To be able to do this you must first beat the story mission "Queen of the Shore" and buy the "Combat Drain" ability. Beating the mission will unlock the Brand ability and buying "Combat Drain" allows you to brand enemies during combat, without having to grab them.
Captains spawn randomly all over the map, but each one of them works for this. Bring down their health until the skull symbol turns green, then unleash your Combat Drain finisher several times.