Teenage Mutant Ninja Turtles Adventures #3

Direct

The Turtles meet a dying alien who tells them to find the pieces of a powerful artifact known as the Eye of Sarnath. They acquire the first piece but it is stolen by Shredder who uses it to shrink the Turtles down to a six inch size. The minuscule Turtles escape and Krang thinks Shredder is lying about defeating them and so Shredder uses the crystal to start shrinking down New York skyscrapers to prove his point.