This could be so many things. Just a generic swayali in battle. Serwa specifically. Or it could be the cipher reappearance of serwe in some supernatural form. Or it could refer to kellhus in battle, or pre battle, or post battle--who knows. Or it could refer to the no god (angel of endless hunger ) or the winged inchoroi . Or mimara in some capacity. Koringhus? Perhaps it is the chariots of the nonmen? Maybe crabfingered boy, infiltrated the ark, cracked the Tekne and is now jet pack flitting about the battlefield, nude (as a phalange-impaired cherub) raining death rays down on all sides while snorting mekeritrig qirri?
Pretty good clue I'd say.
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