# Beyond the Nightmare at Throne of Chaos achievement

> Use a specific Sidereal Skill during a particular attack phase. In Lost Ark, Beyond the Nightmare at Throne of Chaos belongs to the Hidden achievement category.

Canonical: https://lostark.wiki/database/achievements/beyond-the-nightmare-at-throne-of-chaos-10010119

## Objectives

1. Use a specific Sidereal Skill during a particular attack phase while fighting Lord of Degradation Akkan.

Hidden

## Related

- [Home](https://lostark.wiki/)
- [Achievements](https://lostark.wiki/database/achievements)