When it comes to weapons in Horizon Forbidden West, you should spend as much time as possible making the legendary forms available. These weapons give you the most damage when taking out enemies (or removing components) and the most coil slots to get some extra bonuses. One of the best arcs in the game is Deathseeker’s Shadow. Here’s how to get it.
To get Deathseeker’s Shadow, you must earn 80 medals by completing challenges in the arena and bring them to Dukkah in The Maw of the Arena. Staring at the gate to enter the arena, she is on the left.
If you haven’t unlocked the arena yet, you must have retrieved Minerva from under the throne in Memorial Grove, then talked to Dukkah and Kalla. You will be given a new mission to help them get the ballista working again so they can open the arena. When it’s open, talk to Kalla and complete the battle challenges within the time limit to earn medals. When you have 80, talk to Dukkah.
The Deathseeker’s Shadow is a Legendary Hunter Bow with up to five turns after the upgrade and bonuses to critical strike chance and damage, as well as more knockdown and shock damage. It can use Advanced Hunter, Advanced Shock Hunter, and Target Arrows.
https://www.gamepur.com/guides/how-to-get-the-death-seekers-shadow-legendary-bow-in-horizon-forbidden-west How to get Death-Seeker’s Shadow legendary bow in Horizon Forbidden West