Favourite Sabbath song that is ACTUALLY niche/hidden deep in the catalogue?

Mine would probably have to be The Eternal Idol's title track, the album as a whole is never really given too much love, Headless Cross is about the only Martin album that gets mentioned at all. The song is just so doomy, And Martin absolutely smashes it on the chorus with the
SINNEEEEERS, SAY YOUR PRAYERS TONIGGHTT