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After completing Natasha’s companion mission,Origin of the Medicine, inHonkai Star Rail, a new mission calledBlizzard Immunitywill commence. This mission marks the second part of Natasha’s Companion Mission. Your objective is to accompanyNatashato the Overworld, where you will visit her parents and investigate the whereabouts ofDr. Vache.
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This mission offers an exciting continuation of Natasha’s story and provides deeper insight into her background. In the article, we will guide you through each step of this thrilling mission and show you how to complete it and receive the rewards. With these easy-to-follow instructions, you’ll be able to conquer this mission in no time!
Where To Start Blizzard Immunity
In order to begin this mission, you must first reach theTraillbazeLevel 20 and complete theOrigin of the Medicinemission. After doing so, you will receive a message from Natasha asking you to meet her at her clinic. Respond to her message and head toNatasha’s Clinic in Boulder Town. She will ask a favor from you as the supply of medicine is running low. She further asks you to meet her in the Overworld.
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Meeting Natasha In the Overworld
Teleport to theCentral Plaza Space Anchor in Administrative District. Once there, locate Natasha, who can be found standing near the fountain. She wants to buy a gift for her mother, and she requires your assistance. Choose an appropriate gift option and follow the given steps to obtain the necessary items. For instance, if you suggest purchasing a flower fromEversummer Florist, head to the shop and acquire a flower bouquet.
Once you have purchased the gifts, you may teleport to theGoethe Hoteland make your way to the meeting place, where you will find Natasha and her mother. After the reunion, you will be approached by Butler Oswell, who will inform you about the messages sent by Vache.

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Searching For Clues
Once you’ve had a conversation with Butler Oswell, head over to theOutlying Snow Plains,where you’ll need to investigate the area for any signs of Natasha’s missing sibling and his laboratory. Navigate your way to both marked locations on the map, and you will encounter theSilvermane Guard. After conversing with him, make your way to the final location, where you’ll face off against an enemy calledIce Out of Space.
Defeat the enemyand investigate the yellow shining object nearby. After completing that task, take some time to listen to Natasha’s tale before lending her a helping hand. Together, you’ll construct a makeshift headstone for her brother, Vache. After a touching cutscene, the mission will be completed, and you will be rewarded withTrailblaze EXP x350,Stellar Jadex60, Traveler’s Guide x2, Shield x200, Kindling x1, and Credit x25000.