Devil
From ReformedWiki.org, the wiki for Reformed Christianity
The Devil, also known as the Satan, is a fallen angel who acts as the eternal opponent to God.
In the Book of Genesis, Satan appears to Adam and Eve as a serpent and tempts them into committing the first sin.
In the Book of Job, he tests Job's faithfulness to God by inflicting suffering to challenge his righteousness.
In In the Synoptic Gospels, the Devil tempts Jesus, opposes God, and embodies evil, testing faith and human weakness.
