The X-Men fail to protect the M'Kraan Crystal from intergalactic pirates called Starjammers who plan to sell it to D'Ken as well as to use Cyclops as an assassin. Phoenix transports the X-Men to the crystal but D'Ken succeeds in unlocking it's power.
Mark D Snyder
Did You Know?
(at around 15 mins) Jean Grey as Phoenix appears to speak a line, however, Lilandra's voice is clearly heard. See more