Altereactor (オルトリアクター, Oruto Riakutā?) is a Mana Conversion Engine that serves as the heart of an Anti-Anti Saber Decisive Weapon. The Alternium embedded within converts calories into magical energy.
| Rank | User(s) |
|---|---|
| A+ | Mysterious Heroine XX (Alter) |
| No information available. | |
| A | Mysterious Heroine X (Alter) |
| By means of the rare element Alternium, energy of various things is transformed into mana. Mainly sugar.[1] |
- ↑ Fate/Grand Order material V — Profile of Mysterious Heroine X (Alter), translated by King of Padoru at Beast's Lair.
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