Casey has shared the lyrics for the latest song featured in RWBY V9's OST, Checkmate : r/RWBYcritics

I'm the One, RWBY Wiki

Casey Lee Williams & Martin Gonzalez – Checkmate Lyrics

Casey Lee Williams & Martin Gonzalez – Checkmate Lyrics

RWBY Vol.9 Soundtrack - Casey Lee Williams & Martin Gonzalez

Volume 9 Soundtrack Live Q&A with Casey Lee Williams & Martin Gonzalez

RWBY Vol.9 Soundtrack - Casey Lee Williams & Martin Gonzalez

Inside (Music from RWBY, Vol. 9) - Single - Album by Casey Lee Williams & Martin Gonzalez - Apple Music

Casey Lee Williams & Martin Gonzalez - RWBY, Vol. 9 (Music from the Rooster Teeth Series) Lyrics and Tracklist

BEAT SABER Checkmate - RWBY Volume 9 Soundtrack (Full version + Lyrics) [Expert+ SS]

[Lyrics] Checkmate RWBY Volume 9 Soundtrack

Lyrics] Checkmate RWBY Volume 9 Soundtrack