Lunging forward, he plunged the blade up to the hilt into the soft bulb of the second alien's head. Milky pink fluid spurted out at once, then gushed as Luther sliced the knife across the bulb, tearing a long gash.
The victim creature made a noise like a cross between a sneeze and a shrill whistle. As Luther finished the cut, pink milk poured over his hairy forearm, running off the point of his elbow. The alien's head-bulb drained in an instant and collapsed like a deflated balloon.
The rest of the creature's body followed, slumping to the street. Blue and yellow fluids streamed out of the gash, flowing from lower regions of the corpse to mingle with the pool of pink milk.
"Now that's how you kill," said Luther, wiping the dripping blade on his black coveralls. The air was thick with the stink of rotten fish, and he breathed it in deeply. After five killings, Luther was starting to like the rank odor given off by dying Ectozoids.
"Tried," said the first alien, puffing out the word through a fluttering maw on its forehead. "Could not do." The alien's name was Boraf Zolagorg. Like all Ectozoids, it looked like a man-sized jellyfish with a lower body of translucent bulbs and tentacles.
And it was Luther's employer for the duration.
In a way, Luther was sorry that the 'Zoids looked the way they did. Killing a creature that looked like something that had washed up on the beach wasn't quite the same as murdering a red-blooded Earthling.
On the other hand, Luther felt a different kind of thrill knowing that he was the first Earthling serial killer to take a stab at an extraterrestrial species. He liked killing what no human had killed before.
Now if he could just get the 'Zoids to do some killing of their own. It was, after all, the reason Boraf was paying him.