Weekly Boss DropPast Evils of the Borehole Planet Disaster
Past Evils of the Borehole Planet Disaster is a 4★ material in Honkai: Star Rail. See how to get it and which characters/light cones need it below.
Past Evils of the Borehole Planet Disaster is a material ★4 in Honkai: Star Rail. 11 characters need this item to level up. Obtainable from 1 different sources in-game.
Last updated: 30/07/2026
The figures on this page come directly from gamevika's internal game data store (counted/read straight from the real records), not an estimate or copy from elsewhere.
Description
Advanced level-up material for Traces.
Lore
As a descendant bred personally by the Imperator Insectorum, its only desire is to expand the numbers of its kind. It uses giant scythes to harvest planets for its nest, tirelessly nurturing countless offspring, and devastating innumerable lives until the moment of its death. "On the broken planet, giant locusts blotted out the sky, and swarms of insects poured out of the planet's crust. The stag beetle raised this new nest and presented it as a gift to its Imperator Insectorum... May this horror only exist in historical records, never to appear again."
Farm it smart
A BOSS material. The biggest pain: weekly bosses cap rewards per week, so this is often the BOTTLENECK that traps a character at the 70→80 ascension. Only fight the boss dropping mats for the character you are ACTUALLY building — do not spread thin.
Material Planner →How to obtain
- Echo of War: Seclusion Zone
Used to upgrade
Stats
| Rarity | ★★★★ |
| Type | Weekly Boss Drop |
| Stack limit | 99,999 |
Official names in every language
| Tiếng Việt | Tai Họa Ám Ảnh Trên Hành Tinh Sâu |
| English | Past Evils of the Borehole Planet Disaster |
| 日本語 | 星を蝕む古の悪 |
| 한국어 | 별을 갉아먹고 재앙을 낳는 구악 |
| 繁體中文 | 蛀星孕災的舊惡 |
| 简体中文 | 蛀星孕灾的旧恶 |
Where to use it / Related tools
Past Evils of the Borehole Planet Disaster is an upgrade material — check the Material Planner to see how much you need for the character you're building.
Same-type items
FAQ
What is Past Evils of the Borehole Planet Disaster?
Advanced level-up material for Traces.
Where do you get Past Evils of the Borehole Planet Disaster?
Sources for Past Evils of the Borehole Planet Disaster: Echo of War: Seclusion Zone. See the “How to obtain” section above for details on each source.
What type of item is Past Evils of the Borehole Planet Disaster?
Past Evils of the Borehole Planet Disaster is a 4★ material in Honkai: Star Rail, in the “Weekly Boss Drop” category.
What is Past Evils of the Borehole Planet Disaster used for?
Past Evils of the Borehole Planet Disaster is used by 11 characters.