In the manga, Erastone was shown to be a jewel within Honest's crown. When activated, the center opens, shining a light upon the opponent in range of it. Destroying both their Teigu and the crystal itself, after which shattering upon use, the crystal can regenerate over time, giving it a weekly usage.
In the anime, Erastone was shaped as a golden ring of average radius. When activated, a purple eye opened in its center, with black branching patterns appearing around the eye itself. Once its user chose their target, the ring shined a bright light towards a designated Teigu, disabling and destroying the weapon and itself afterward. It is not known if Erastone can regenerate in this version, and if so, how long that takes it.
- Akame ga Kill! anime; Episode 24