The players are summoned to the urban dwelling of Gephard the Diviner. Upon arrival at his brownstone, the door will open before they knock The interior of the building is dimly lit, and everything is draped in black velvet. The room is huge and filled with various beakers and magical devices, all from ongoing experimentation and also for information gathering. An unseen voice says "I'll be with you in a moment" After waiting a few minutes the diviner enters the room, a tall bald man of indeterminate age dressed in tight fitting clothing.
Gephard will inform the party that there have been a series of moonquakes here on the swamp moon of Dire. He will pay them handsomely to head directly west out of the canaled city of Mysantia and into the deep swamp. He is extremely concerned as the so far mild tremors are both very regular and increasing exponentially in severity.
After trekking through the dense swamp for 3 days, only able to make about 5 miles a day. They hear a loud bellowing sound to their north. Upon investigation a large winged whale is discovered in a very bad state, along with a dead whale sized bat. The whale is making a tremendous sound.If they approach within 150 feet , the whale is able to communicate telepathically.
The whale will communicate in telepathic like picture hieroglyphics that will be surprisingly clear. He had been starting.the mating ritual with his wife when they were attacked in space by the predatory bat. He killed the bat and all three plummeted to the surface of the swamp moon.His wife , in spasm because of the interrupted ritual is causing the moon quakes. She will not be able to go back into space and the only way to stop the quakes would be to impregnate her. First they will have to "ahem", "harvest" his seed.and take it with them to her. He will need months to recover and she will literally shake the moon apart in only a few weeks.
After a further 3 day trek deeper into the swamp, they will discover that the female space whale is incredibly sexually dymorphic and has taken on the form of 25 square miles of swamp! They will need to explore the females camouflage to find the right "ahem" spot to climb deep into. Scattered through out the female are giant angry space crabs.
The artificial insemination will cause the moonquakes to cease!!!!!!
Scatter hostile swamp encounter as desired.some suggestions: velocerapters and other dinos , Giant carnivorous apes and swarms of both fist sized mosquitoes and killer frogs.