Ithildin is a series of collectible puzzle images that can be acquired by searching multiple locations over Mordor. These individual pieces, referred to as glyphs, are marked on the map after reforging a Forge Tower. In order to see the glyphs the player will have to enter Wraith mode, after which they are able to collect the individual glyphs. The pieces are then automatically added to the wall.
Ithildin, also called "Starmoon", are ancient symbols that can be found carved into the living stone and ruins of Mordor. They are relics of an ancient Kingdom invisible to all but the Wraith, who can see into the unseen world.
The Wraith within Talion can view and activate these symbols of power. More to the point, he feels a distinct connection with them. They are relics of his past.
The Lord of LightEditThe Ithildin wall when it's finished]]
I am The Bright Lord of Mordor.
The silver hand that drives back the darkness,
Reaching through the fog of night,
To avenge those long betrayed.
Arise from fields of death,
And march forth from the shadow,
Through the purifying flames of war,
You who were once eldar shall be reforged.
Beneath my hammer,
The Bringer of Gifts, the Betrayer shall be un-made,
I renounce the Blessed Realm.
To redeem the Land of Shadow.
And bind the walls of Arda,
In place of the Dark Lord,
You shall have light undiminished,
All shall fear me and rejoice.
Nan iChîr Gelair Mordor