The Burning Red Grimoire (
The Grimoire can be made with the combination of a Remix Heart and an incredible amount of sacrifices. An incomplete version of it can be made with a Remix Heart alone, where it takes the form of an orb of light. In the brief time it was used, it created a large torrent of lightning that was strong enough to punch a crater into a wall. 
Cypher Albar longed for this Grimoire, making it his life's obsession to claim it. He was briefly able to create one by using Mai Natsume but it was stolen from him by Hazama. Its current location is unknown.
BlazBlue Alternative: Dark War Flavor Text
One of the Six Heroes, the Great Magister Nine, crammed the foundations of her own techniques into a single grimoire...A tome also regaled as the "strongest." All to oppose that man...
- BlazBlue: Remix Heart, Chapter 24
- BlazBlue: Central Fiction, Arcade Mode, Mai Natsume Victory Quote Vs Nine the Phantom