Questions we may never get an answer to.

[Morningstar1337]

I'm betting Sabik was the other name for Ultima. Ultima IS the only Lucavi without a 2nd name after all.

Would be thematically...off-kilter as The Lucavi have an association with a Zodiac sign and Ultima's specifically is Virgo. While Sabik is closer to Serpens and Ophichus, both of which relate to Zodiark.

I do think the two are related, but I also think the Heart of Sabik is Zodiark's Auracite, or rather an auracite that summons a facsimile of it.