X9 #4/1969

In "Kuppen mot dödskallegrottan," the Phantom and a group of jungle folk are suddenly snatched into the sky by an unseen force, plunging into a perilous journey beneath the earth. Trapped in the depths, they confront Dr. Krazz and the Mytors, a secretive underground race plotting to harvest human specimens for their plan to dominate the surface world. With cunning and courage, the Phantom turns the tide, freeing his companions and sending Krazz to face the consequences—before sealing the threat with a daring act of destruction.