Nightmare

"'A terrifying creation that shouldn't exist. Ore from this mine start out heavily negated. 2017 Halloween Exotic.'"

Overview
The Nightmare is an Exotic-tier mine released on the 2017 Halloween Update. or the Autumn Update?

The mine is functionally a five-spout mine while appearing as a conglomeration/mess of black tendrils embedded by and around red rock and pumpkins. A column of fire is around the back while red-tinted ghouls and ghosts are around it.

Trivia

 * It is one of the first exotic mines since the 2016 Spooky Update.