Quote from Omnirahk »Without any actual knowledge of the language itself, I'd bet either, 'Dark Ritual,' or , 'Phyrexian Scripture(s).'
Definitely not the latter, as it doesn't include the word for Phyrexian, and I doubt the former, because even Phyrexians don't view their works as "dark". They're improving everything they touch!
I saw a suggestion on Reddit that it might be something along the lines of "compleation" or "birth". I don't have a better guess, because that word doesn't bear any particular resemblance to a word we've seen before.