[Jen and Kira are riding Landstriders.]
Jen: The prophecy never said anything about this.
Kira: Prophets don't know everything.
Narrator: Another world, another time, in the age of wonder. A thousand years ago, this land was green and good - until the Crystal cracked. For a single piece was lost; a shard of the Crystal. Then strife began, and two new races appeared: the cruel Skeksis, the gentle Mystics. Here in the castle of the Crystal, the Skeksis took control. Now the Skeksis gather in the sacred chamber, where the Crystal hangs above a shaft of air and fire. The Skeksis with their hard and twisted bodies, their harsh and twisted wills. For a thousand years they have ruled, but now there are only ten. A dying race, ruled by a dying emperor, imprisoned within themselves in a dying land. Today, once more, they gather at the Crystal as the first sun climbs to its peak. For this is the way of the Skeksis. As they ravaged the land, so too they learned to draw new life from the sun. Today, once more, they will replenish themselves, cheat death again, through the power of their source, their treasure, their fate - the Dark Crystal.
Jen: When single shines the triple sun, what was sundered and undone, shall be whole the two made one, by Gelfling hand or else by none.
Answer: The skeksis and the beings of light are the same, each being a different side (good and bad) therefore it was there evil side (the skeksis) that struck the crystal.