# Chaos Astrogem: Corrosion item

> Chaos Astrogem: Corrosion: Contained in. Epic Astrogem Selection Chest, Epic Astrogem Selection Chest, Epic Astrogem Selection Chest

Canonical: https://lostark.wiki/database/items/chaos-astrogem-corrosion-67411303?relation=containers

*Epic*

Use to obtain an unprocessed Astrogem.  
Astrogems forged as Roster-bound through fusion will be converted to character-bound once unlocked.  
  
However, Roster-bound Astrogems can be processed using Silver.

It drops from [Phantom Legion Chess King](https://lostark.wiki/database/npcs/phantom-legion-chess-king-890302), [Plague Legion Loogdoom](https://lostark.wiki/database/npcs/plague-legion-loogdoom-890312), and [Darkness Legion Kiril](https://lostark.wiki/database/npcs/darkness-legion-kiril-890322).

## Facts

- **Shop sale**: 1 Silver
- **Binding**: Bind on pickup

## Acquisition & uses

- [Dropped by](https://lostark.wiki/database/items/chaos-astrogem-corrosion-67411303#relationships) (15)
- [Possible dismantling results](https://lostark.wiki/database/items/chaos-astrogem-corrosion-67411303?relation=dismantles_to#relationships) (1)
- [Contained in](https://lostark.wiki/database/items/chaos-astrogem-corrosion-67411303?relation=containers#relationships) (20)

### Contained in

1–20 of 20

| Name | Quantity | Details |
| --- | --- | --- |
| [Epic Astrogem Selection Chest](https://lostark.wiki/database/items/epic-astrogem-selection-chest-52327002), Tier 4 | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Epic Astrogem Selection Chest](https://lostark.wiki/database/items/epic-astrogem-selection-chest-52327003), Tier 4 | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Epic Astrogem Selection Chest](https://lostark.wiki/database/items/epic-astrogem-selection-chest-52327004), Tier 4 | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Epic Astrogem Chest](https://lostark.wiki/database/items/epic-astrogem-chest-61001442) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Epic Astrogem Selection Chest](https://lostark.wiki/database/items/epic-astrogem-selection-chest-61001531) | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Epic Astrogem Chest](https://lostark.wiki/database/items/epic-astrogem-chest-61105888) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Rare - Epic Astrogem Chest (Event)](https://lostark.wiki/database/items/rare-epic-astrogem-chest-event-61105891) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Epic Astrogem Chest](https://lostark.wiki/database/items/epic-astrogem-chest-61105950) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Epic Astrogem Selection Chest](https://lostark.wiki/database/items/epic-astrogem-selection-chest-61105981) | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Epic Astrogem Selection Chest (Chaos)](https://lostark.wiki/database/items/epic-astrogem-selection-chest-chaos-61106281) | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Epic Astrogem Chest](https://lostark.wiki/database/items/epic-astrogem-chest-61106400) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Epic Astrogem Selection Chest](https://lostark.wiki/database/items/epic-astrogem-selection-chest-61204261) | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Epic Astrogem Chest](https://lostark.wiki/database/items/epic-astrogem-chest-61304793) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Astrogem Random Chest](https://lostark.wiki/database/items/astrogem-random-chest-67300020) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Chaos Astrogem Random Chest](https://lostark.wiki/database/items/chaos-astrogem-random-chest-67300022) | 1 | Obtain one of the following items at random.; Quantity 1 |
| [Epic Astrogem Selection Chest (Chaos)](https://lostark.wiki/database/items/epic-astrogem-selection-chest-chaos-70705731) | 1 | You can select and obtain 1 of the following items.; Quantity 1 |
| [Chaos Astrogem Chest (S)](https://lostark.wiki/database/items/chaos-astrogem-chest-s-71911223) | 1 | There is a chance that you can obtain one of the following items.; Quantity 1 |
| [Chaos Astrogem Chest (M)](https://lostark.wiki/database/items/chaos-astrogem-chest-m-71911224) | 2 | There is a chance that you can obtain one of the following items.; Quantity 2 |
| [Chaos Astrogem Chest (L)](https://lostark.wiki/database/items/chaos-astrogem-chest-l-71911225) | 5 | There is a chance that you can obtain one of the following items.; Quantity 5 |
| [Epic Astrogem Selection Chest](https://lostark.wiki/database/items/epic-astrogem-selection-chest-72200036), Tier 4 | 1 | You can select and obtain 1 of the following items.; Quantity 1 |

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