Old Testament believer.
Yep, agreed.
Onedoug, check out Isaiah 14 and Ezekiel 28 for mention of Satan.
Isaiah 14 begins with an address to the king of Babylon; Ezekiel 28 to the prince of Tyre. Both, however, go beyond them to the being who stands behind them and influences them.
The references to Satan are clear, describing his fall from heaven, and his titles-—star of the morning and son of the dawn. (Isaiah 14:12).
Ezekiel 28:12-15 references his presence in the garden of Eden, his perfect beauty and wisdom, his “seal of perfection”, and his previous status as God’s anointed cherub.
Also, Zechariah 3:
“Then he showed me Joshua the high priest standing before the angel of the Lord, and Satan standing at his right side to accuse him. The Lord said to Satan, “The Lord rebuke you, Satan! The Lord, who has chosen Jerusalem, rebuke you! Is not this man a burning stick snatched from the fire?”