In The Time of Dinosaurs

The ground beside me exploded, like it had been ripped by an invisible plow. I jumped. Another plow mark just behind me! I saw movement. And there, racing toward us across the plain, was a gleaming, silver craft.
Maybe twice the size of a Bug fighter, but shaped like an elongated pyramid, long end forward.
Ch-ch-ch-CHEEEEEW! Ch-ch-ch-CHEEEEEW! Ch-ch-ch-CHEEEEEW!
The ship fired again and blew two more five-foot-long furrows in the ground.

—M2C21

[...]

The pyramid ship fired.
<Aaaaahhhhhh!> Jake cried.
He fell forward, half a dinosaur.
<DEMORPH!> I screamed.
The pyramid ship turned at a leisurely pace, hovering directly above the writhing, thrashing, helpless monster who was Jake.

—M2C33