He ran his swollen tongue over lips coated with a strange, black substance.

He stepped in a strange black substance on the floor that coated his paws.

Teldin could see that it was of a strange substance, almost flesh.

Tears start to my eyes, and I am overwhelmed by a desire to spit out this strange substance.

It was a ball of some strange substance, white and fresh-appearing.

While he is working, he finds a can full of a strange substance sitting on a table.

Grace reached out carefully, meaning only to touch and examine the strange substance.

The sound inside the city died quickly, muffled by the strange substance used in the walls.

Even less well might I describe an odor or a flavor or the feel of some strange substance.

The properties of the strange meteor substance was still unknown.