Luka is a four-star Physical character who follows the Path of the Nihility. He originated from Belobog's Underground, exposing him to some of its most influential organizations, including Wildfire and the Fight Club. While Luka was absent from the early stages of Honkai: Star Rail's story, you might just fall in love with his disposition, from his red hair to his overenthusiastic personality.
Being the first Physical Nihility character, I've enjoyed using Luka since his release. If you're interested in building him, these are all the materials you need to collect.
Honkai Star Rail Luka Ascension materials
| Ascension material | Where to farm |
|---|---|
 x12 Ancient Part | Automatons Simulated Universe enemies Rewards from Assignments Embers Exchange Omni-Synthesizer (Material Exchange) |
 x13 Ancient Spindle | Automatons Simulated Universe enemies Omni-Synthesize (Material Synthesis and Exchange) |
 x12 Ancient Engine | Automatons Simulated Universe enemies Omni-Synthesizer (Material Synthesis and Exchange) |
 x50 Broken Teeth of Iron Wolf | Stagnant Shadow (Great Mine) Omni-Synthesizer (Material Exchange) |
Luka's Ascension materials can be farmed from the sources listed above. In addition, prepare 246,400 Credits to fully Ascend him to Level six. You need to have access to the Great Mine to farm his materials, which opens fairly early into the game as you play through Belobog's story.
Related: Honkai Star Rail Simulated Universe World 5 Guide: How to Beat Kafka
Honkai Star Rail Luka Trace materials
| Trace material | Where to farm |
|---|---|
x28 Ancient Part | Automatons Simulated Universe enemies Rewards from Assignments Embers Exchange Omni-Synthesizer (Material Exchange) |
x42 Ancient Spindle | Automatons Simulated Universe enemies Omni-Synthesize (Material Synthesis and Exchange) |
x42 Ancient Engine | Automatons Simulated Universe enemies Omni-Synthesizer (Material Synthesis and Exchange) |
 x12 Obsidian of Dread | Calyx (Great Mine) Embers Exchange |
 x54 Obsidian of Desolation | Calyx (Great Mine) Embers Exchange Omni-Synthesizer (Material Synthesis) |
 x105 Obsidian of Obsession | Calyx (Great Mine) Omni-Synthesizer (Material Synthesis) |
 x12 Regret of Infinite Ochema | Echo of War: Scalegorge Waterscape |
 x5 Tracks of Destiny | Embers Exchange Nameless Honor Simulated Universe (Point Rewards) Limited-Time Event Rewards |
Above are all of the materials you need to farm to max out Luka's Traces, on top of 1,758,000 to pay for the level-up cost.
Make sure to farm the Automatons at the following minimum Equilibrium Levels: level two for the Ancient Spindle and level four for the Ancient Engine. The Regret of Infinite Ochema will require you to defeat Phantylia the Undying, which is quite a tough battle—so take advantage of friend Supports to help.
For more on Belobog characters, check out our Honkai Star Rail Best Hook Build – Light Cones, Relics, & More! here on Pro Game Guides.
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Honkai Star Rail Luka farming guide
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