James Blish, "Black Easter" wrote:

The palazzo shuddered again. Then, from the middle of the triangle to the northwest, a slow cloud of yellow fumes went up toward the ceiling, making them all cough, even Ware. As it spread and thinned, Baines could see a shape forming under it; but he found it impossible to believe. It was -- it was something like a she-wolf, gray and immense, with green and glistening eyes. A wave of coldness was coming from it.

The cloud continued to dissipate. The she-wolf glared at them, slowly spreading her griffin's wings. Her serpent's tail lashed gently, scalily.

In the northern pentacle, the great Abyssinian cat sat up and stared back. The demon-wolf showed her teeth and emitted a disgusting belch of fire. The cat settled its front feet indifferently.

"Stand, by the Seal" Ware said. "Stand and transform, else I shall plunge thee back whence thou camest. I command thee."

The she-wolf vanished, leaving behind in the triangle a plump, modest-looking young man wearing a decorous neck tie, a dildo almost as long and nothing else. "Sorry, boss," he said in a sugary voice. "I had to try, you know. What's up?"