Source: Beautiful Redemption Kami Garcia page 339
Context: Genevieve Duchannes materialized in the darkness.
In their words:
[ muh–teer-ee-uh-lahyz ]
verb (used without object), ma·te·ri·al·ized, ma·te·ri·al·iz·ing.
to come into perceptible existence; appear; become actual or real; be realized or carried out:Our plans never materialized.
to assume material or bodily form; become corporeal:The ghost materialized before Hamlet.