Satan Is Transformed Into An Angel of Light

2 Corinthians 11:14 And no marvel; for Satan himself is transformed into an angel of light.

Satan's Ministers (His Angel) Also Transformed As The Ministers of Righteousness

2 Corinthians 11:15 Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works.

Satan's Ministers Will Preach Another Gospel

Galatians 1:6 I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:

Galatians 1:7 Which is not another; but there be some that trouble you, and would pervert the gospel of Christ.

An Angel From Heaven Preach Another Gospel Let Him Be Accursed

Galatians 1:8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.

If Any Man Preach Any Other Gospel Let Him Be Accursed

Galatians 1:9 As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed.

Rev 14:6 And I saw another angel fly in the midst of heaven, having the everlasting gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and  people,