Kuva and Requiem
Kuva, which carries the bonds of mind, body and immortality, and Requiem, the language that reads and breaks them.
OROKIN · ADVERSARYFULL SPOILERS
Kinds of Kuva
Red Kuva appears in body transfer and in producing Liches; different forms of Kuva carry particular ritual and narrative functions. The full origin of the substance is still not fully explained.
The Requiem sequence
Lohk, Xata, Jahu and the other words are used as Parazon Mods in a fixed order. It is not a random password but the sequence that fits the target's Continuity structure.
The Albrecht connection
Entrati records tie the Requiem language to the discovery of the Void and to thinking about death. The system is older and wider than Lich mechanics alone.