Tar Goroth is a Balrog, a fire demon with incredible power. During Middle-earth: Shadow of War, Tar Goroth is summoned by Sauron's army and threatens the forest of Carnán. Talion must ally with the spirit of Carnán to repel Tar Goroth.
Fighting Tar Goroth is a multi-tiered battle, which involves fighting alongside the spirit of Carnán. The first part of the battle requires you to shoot out Tar Goroth's back and chest with your arrows. This needs to be done multiple times while the spirit of Carnán struggles against it. The second part has you mounting a drake version of the spirit of Carnán and battling Tar Goroth directly on an icy lake.