If you’ve ever stared at a character ascension menu or light cone upgrade screen wondering why you’re short on a specific rare material, you’re not alone. Most mid to late-game Honkai: Star Rail players hit a wall when they need to upgrade multiple 5-star units at once, and one of the most sought-after materials is undying starlight. It doesn’t drop from regular overworld enemy kills, and it’s not sold in most common shops, so a lot of new players struggle to track down consistent sources for it. I’ve spent the last 8 months grinding endgame HSR across two accounts, so I’ve pulled together every reliable way to farm this material, plus tips to avoid wasting it on low-priority upgrades.
Core Reliable Methods to Get Undying Starlight in Honkai: Star Rail
There are no secret hidden exploits to get infinite undying starlight, but there are 5 consistent sources you can count on every patch to build up your stock. I’ve tested all of these methods extensively, and these are the only ones that are worth your time and effort:
- Simulated Universe World 7 and above clear rewards: Each weekly clear of World 7, 8, or 9 on any difficulty gives 2 to 6 undying starlight per run, plus bonus drops from elite enemies inside the instance. Higher difficulties have higher drop rates for extra starlight from elite mobs.
- Echo of War endgame challenge clears: The higher difficulty Echo of War fights (levels 80 and up) have a 30% to 40% chance to drop 1 undying starlight per run, and you get a guaranteed 3 per weekly first clear of each available fight, no extra effort required.
- Nameless Honor battle pass rewards: Both free and paid tiers of the battle pass include 5 to 12 undying starlight across levels 20 to 50, depending on the current season’s reward lineup. The paid pass gives almost double the starlight of the free tier for a low cost.
- Event limited-time shop exchanges: Almost every major update event has an event shop where you can exchange event currency for up to 10 undying starlight per event. You don’t need to grind extra event stages to get enough currency, just complete the daily event tasks.
- Duplicate 5-star character/light cone pulls: If you pull a duplicate 5-star character you already own, you get 10 undying starlight automatically, and duplicate 5-star light cones give 8 undying starlight each. C6 5-star characters give 20 starlight per extra duplicate, but that’s only relevant for high-spending players.
I don’t recommend pulling on banners just to get extra starlight, obviously, but it’s a nice bonus if you’re pulling for a unit you already want anyway. The most consistent farmable source by far is Simulated Universe runs, so if you need a lot of starlight fast, prioritize clearing your weekly Simulated Universe resets before you do anything else. You can only get 24 undying starlight per week from non-event, non-pull sources, so plan your upgrades accordingly if you have multiple units waiting for ascension.
Optimal Farming Routes to Maximize Weekly Undying Starlight Gains
Most players only run Simulated Universe once a week for the bonus rewards, but you can squeeze extra drops out if you run specific paths and worlds. I’ve tested 12 different route combinations over the last 3 patches, and the most efficient one is running World 8 on difficulty 4 twice a week, then clearing all 3 available Echo of War fights on the highest difficulty you can complete. World 8 has the highest elite enemy count of any Simulated Universe world, so you get more chances for random starlight drops between boss fights.
If you run the Nihility path with a fully built Kafka or Blade team, you can clear each run in under 12 minutes, which is way faster than running lower worlds for fewer rewards. I usually run the Nihility path with my Kafka dot team, and I rarely have to restart runs even on the highest difficulty. The Propagation path also works well if you have a strong Hunt DPS like Seele or Dan Heng Imbibitor Lunae, because it spawns extra elite enemies that can drop extra starlight.
I usually do my Simulated Universe runs on Monday right after the weekly reset, that way I don’t forget about them later in the week when I get busy with other content. That routine gives me between 20 and 24 starlight per week, which is the maximum you can get from non-pull, non-event sources. If there’s an event running with starlight in the shop, that adds another 10 per event, so I can get up to 34 starlight a week during event patches. Don’t forget to claim your Nameless Honor rewards every time you level up the pass, a lot of players leave those sitting for weeks and miss out on free starlight.
Smart Ways to Use Undying Starlight Without Wasting It
It takes weeks to build up a decent stock of undying starlight, so you don’t want to waste it on low-value items that you can get from other sources for free. The only items worth buying with undying starlight are 5-star light cones from the shop and emergency character ascension materials for limited 5-star units. A lot of new players waste their starlight on 4-star light cones or random trace materials, but those are way easier to get from the Forgotten Hall shop or from event rewards.
The 5-star light cones in the undying starlight shop are some of the best F2P-friendly options in the game, so they’re well worth saving for. Night on the Milky Way is a universal DPS light cone that works on almost every Hunt, Erudition, or Destruction DPS character, so that’s the first one I recommend buying if you don’t have a signature 5-star light cone for your main DPS. Memory of the Past is the best F2P light cone for Harmony supports like Bronya and Tingyun, because it boosts their energy regeneration and gives extra damage buffs to the team. You need 600 undying starlight to buy one 5-star light cone, so it takes about 6 months of consistent farming to get one as a F2P player, but it’s well worth the wait.
Don’t use starlight to buy standard banner passes, that’s a terrible value for your resources. I made this mistake when I first started playing, I spent 200 starlight on 10 standard passes and got nothing but 3-star light cones and duplicate 4-star characters I already owned. That was a huge waste of resources that I could have used to buy Night on the Milky Way for my main DPS months earlier. If you’re a low spender, prioritize buying one copy of each of the 5-star light cones you need before you buy any extra copies for superimposition, because the base copy gives you most of the power boost.
Common Mistakes to Avoid When Farming Undying Starlight
Even if you follow the farming routes we laid out, you can still slow down your progress if you make these common mistakes I see players make all the time. The first mistake is running lower difficulty Simulated Universe worlds because they’re easier. World 6 and below don’t drop undying starlight at all, so don’t waste your time running those if you’re farming for starlight. It’s better to spend a few days upgrading your main team to clear World 7 or 8 than to waste your weekly reset on lower worlds that give no starlight.
If you’re struggling to clear higher difficulty Simulated Universe worlds, focus on upgrading one strong DPS team first before you start farming for starlight, it’ll save you a lot of time and frustration in the long run. You don’t need all your teams built to clear Simulated Universe, just one strong core team that can handle elite enemies and bosses quickly.
Another common mistake is hoarding starlight for no reason. I have a friend who has over 1200 undying starlight saved up, but he doesn’t have any 5-star light cones for his main DPS team. He’s been hoarding for over a year because he’s waiting for a specific light cone to be added to the shop, but in the meantime, he’s struggling to clear higher difficulty Forgotten Hall stages because his team is underpowered. It’s better to use your starlight to upgrade your current team so you can get more resources faster, instead of hoarding it for a hypothetical future item. The only time you should hoard starlight is if a new 5-star light cone you really want is confirmed to be added to the shop in the next patch.
At the end of the day, learning how to get undying starlight in Honkai: Star Rail isn’t about finding some secret hidden exploit, it’s about sticking to a consistent weekly routine and making smart choices with how you spend the resources you earn. You don’t need to spend hours grinding every day to get enough for your upgrades, just prioritize your weekly Simulated Universe and Echo of War clears, take advantage of event shops, and avoid wasting your stock on low-value items. If you follow the tips we’ve laid out here, you’ll have more than enough starlight to upgrade all your favorite units and light cones without any extra stress.
