Whenever he shifted position he felt an alien substance under his chin.

This system acts to prevent alien substances from affecting the body in a harmful way.

Unfortunately, this brought feet, pincers, and in some cases other delicate body parts into contact with the alien substance.

It had been all but completely mineralized by contact with the alien crystalline substance.

Children's toys made from exotic alien substances that were smooth and chill to the touch.

A thick green alien substance had been seeping up from the opening in the ground.

As long as you've got that alien substance in your system, I can't let you take on any additional stress.

The captain had seen him do it a hundred times before, with a hundred different alien substances.

Prime is a source of energy, an alien substance that alters the world and gives its users power over it.

Gryffen discovers the identity of the alien substance, it is called Cerulium.