Review for LEGO set 7704 Sonic Phantom from CollectionDX
“The Sonic Phantom is not considered a Battle Machine even though it was designed exclusively for combat. The Sonic Phantom is one of five “Exo-Force” sets that use the newly-developed Lego light brick- a transparent 2 x 4 brick that has a small red light emitting diode... More (LED), a small, enclosed, self-contained battery, and a small trigger blended into the top.”