How do I get Ornstein's armor? (Dark Souls 3)

Fastest than you
Kill the Nameless King. And in the place where the battle took place, you need to run a little, search.

Fastest than you
there and his spear near

Fastest than you
At the peak of the archdragon, you need to kill the boss of the nameless king (the lord of the storm first) There after him there will be Ornstein's armor, his spear and a piece of titanite :)

THX