The victor gets some experience points and an item, the loser dies. You pit one of your Followers against a random enemy. You unlock them after you take down your first Fortress. The arena Fight Pits can be a fantastic way of bolstering your forces. While this makes it impossible to tell you exactly How To Get Legendary Followers In Middle-Earth: Shadow Of War, there are some general techniques that work well and have a good success rate.
This means when you locate a Legendary Follower, it won’t be in the same place, or even the same Follower as other players. The Nemesis system in Middle-Earth: Shadow Of War means each play through is unique, it’s different.