Illusions (Packet of 100, NKJV) The cover of this tract presents two optical illusions, then goes on to explain seven spiritual illusions Satan uses to keep us from God. Colorful images and high-quality, glossy paper increase appeal. Excellent value! Order as many tracts as you want and only pay one shipping charge. Shrink-wrapped in packets of 100. Also available in packets of 20. Verse quotations from the New King James Version (NKJV).