Skimming through the books today, but not much to go on...
More of the impossible the transporter beams, presented in an image of chittering energy, looped like the tail of a running animal, then were swallowed by the phenomenon out there.
As they stood together and watched the screen, a form began to take shape, emerge from the gash in open space. A solid form. A vessel ... a ship ...
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Interior....
Volcanic wind ... perfumed, reeking atmosphere ... and a sound of engines.
Kellen materialized gagging.
As soon as the transporter beams released him, he stumbled back against a hard surface, and choked. The air here was heavy, vaporous; the surface against which he leaned was mossy. He huddled against it until his eyes adjusted to the dimness.
The ceiling was only an arm's length over his head. Higher in some places. A tunnel of some sort? A cave?
Hard ground beneath his feet. Skin itching. Plant life sedge, burrs and creepers, algae, spotted cabbage, puffballs, adder's tongue ... He recognized some of them; others were familiar but had the wrong color, the wrong shape, or the wrong smell. He was no botanist.
Pungent odors ... If he could only get a whole breath. Then he could think.
Think, think. Cling to self-control.
He had been transporting from Ruhl's ship to his own. Now he was on some planet, in a cave.
"But there were no planets left," he rasped. The sound of his own voice anchored him. "Especially none with life...."
He pressed his hand to the wall. Parasites jumped from the moss onto his hand and skittered in confusion. Life.
Small life, but company was company.
At least he could eat.
He pushed off the cave wall. He took one step, then stopped as he thought of something else. Kneeling, he peered at the ground. There was growth here too, but vetchy, flattened growth. Flattened by other footsteps? Where he could walk, so could others.
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A ship had come out of that crack or hole or blur in space. There had been a great shaking, not as great as the mass drop, but enough to send the fleet spinning for a few seconds. When they gathered themselves, there was a ship there.
Configured like no ship Aragor had ever seen, this alien vessel was the length of their entire fleet six ships laid beak to tail and shaped like a corkscrew. Great fans of black and purple hull material fanned out and overlapped each other in a spiral against each other, arching forward like welded petals into a point. There was no top or bottom, no visible bridge or command center. Seeming almost to flex its way through space, it was constructed perfectly to screw through that opening out there. The more he stared at the hornlike ship, the more Aragor became sure these last moments were no accidents. The mass falloff had something to do with these newcomers.
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Aragor squinted and watched. That could make his task easier. The enemy ship was taking the direct fire on its many fan-shaped hull sculptures.
"This must be their manner of defense," he said. "There must be another ship, the real ship, hidden inside the outer fan arrangement. That makes it almost impossible for a moving vessel to hit. In order to incise that inner ship, an attacking vessel would have to hover over it and fire down between the fans."
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"How do you know it's coming?" Kirk asked.
"My squadron encountered the beginning of it. The coming of the Havoc ship."
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I'll do some more looking tomorrow, in the other books, but outside of a large demonic looking mass, with individual ships protecting the center hull, there really isn't much of a description.
Stephen