Quartz correction – Tony Iommi was the producer of Quartz debut, not Martin Birch, which provides a more clear link between Geoff Nichols and Sabbath.
R.I.P Warrel Dane
Accursed – Satanic Ritual (Demo) – NY based band formed in 1988 that released this and a less widely available demo called Cries of Blasphemy in 1990. Notable for being far more Satanic than a bulk of tech death bands at the time. Broke up at an unknown point sometimes after
Necrotic Mutation – Another Quebec band, active as Disaster……