(slightly outdated) Saviour of Sedna Trophy Talkthru (Warframe PS4)
8A simple walkthrough with commentary of the Sedna Boss (Assassination) mission on the Merrow sector against Kela De Thaym needed for the Saviour of Sedna Trophy on the PS4.
On the way, watch out for the rolling balls and the female Scorpion enemies.
The boss can shoot rockets, throw grenades, and generate rolling balls. She also has ground attack that sends out a shockwave and refills her shield when she does it.
After completion you should have the Nav Segment to unlock Europa and you should have a blueprint for either the Helmet, Chassis, or System for the Saryn Warframe.
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