In Middle Earth Shadow of War, Talion can get more and more powerful through the acquisition of skills. Also he can get more and more powerful by get more powerful gear. There are epic gear. Then there are the legendary gear.
To get gear, defeat captains. The higher the level of captains, the better and more rare type of gear Talion will get.
Talion will need to get to the barrows to get to the poem doors. Behind each door is a legendary gear.
This is the poem door in the Cirith Ungol region.
After getting the gear, use gems to further increase Talion’s stats.