Complete all Hunting Challenges.

Brand 5 Bodyguards of a Warchief, turning them against him in combat.

Complete all Urfael Legend Missions.

Successfully complete 4 Hunting Challenges.

Collect 50% of the Ithildin.

Issue a Death Threat, and then successfully kill the target.

Kill The Tower.

Kill the Great White Graug.

Start a Riot by commanding a Warchief to attack another Warchief.

Collect 25% of the Artifacts.

Brand a Captain while in combat.

Kill all 5 Warchiefs before any uruk take their place.