He was spiritually gifted by God to accomplish a task for the advancement of the kingdom. Satan, surrounded by evil angels, and claiming to be God, will work miracles of all kinds to deceive, if possible, the very elect. God's people will not find their safety in working miracles, for Satan would counterfeit any miracle that might be worked. This is the only foundation upon which they can stand securely. Those who have broken their covenant with God will in that, day be without hope and without God in the world.
Spiritual warfare is a modem phrase for an old battle.
Adventists usually call it the great controversy between Christ and Satan. Often the battle lines become closely drawn, and the forces of good and evil are embroiled in tangible battle. A classic example is Elijah's experience on Mount Carmel. This gift is alluded to, but is not directly mentioned in any list in the New Testament. The gift of deliverance or exorcism has been abused and misused in such spectacular ways that it is often hard to tell the true from the counterfeit.