Smoky, Smoky Spires

Smoky, Smoky Spires is an anomalous lava level found in some personalized copies of Super Mario 64, often said to be a replacement of Lethal Lava Land, occasionally even appearing as a sub-course. This has caused some to compare it to other anomalous levels such as Lethal Lava Ruins. Smoky, Smoky Spires is described as a large plane of lava with several titular spires sticking up from the lava, emitting lots of smoke around the top part of the level. When appearing as it's own course, Smoky, Smoky Spires reportedly appears in a false wall in the basement of Princess Peach's Castle similarly to Shifting Sand Land.

Description
Smoky, Smoky Spires is described as a large plane of lava with several spikes, or spires, sticking out of the lava, making up a majority of the level. These would be most commonly navigated through various floating platforms or gust of winds on the top of smaller spires, which would emit a unique smoke that functions similarly to Hazy Maze Cave's toxic gas. The area around the lava is reportedly traversed with platforms made out of bones and skulls, similarly to a type of platform in Super Mario World. This lower area reportedly has the unused Blargg enemies, while Fly Guys populate the upper area.

Occasionally, entrances within some of the titular spires have been reported. The interiors are usually a sub-section of the course that are themed similarly to Lethal Lava Land's volcano, a tall course that Mario must ascend to collect a Star.

Missions
The three most common ways to obtain Power Stars in Smoky, Smoky Spires are by collecting 8 red coins, reaching the top of the level, and defeating an anomalous Boss Blargg boss fight at the bottom of the level. Another semi-commonly reported Power Star is obtained by somehow causing it to burst out from the top of a spire through varying means.

Phenomena
A notable occurrence is that at least one Star is always seemingly unobtainable by normal means. In most copies that include the course, the Star appears to be obtained by somehow clearing away a majority of the smoke in the level through unknown means. To date, there have been no reports of successfully completing a mission of it's nature, and it is believed that doing so would have a course-altering effect, however this is so far unproven.

This, by proxy, means that no copy with Smoky, Smoky Spires can be 100% completed, until a method of completing this Mission is found.

Blargg enemies that spawn in the course are notably more intelligent, having basic intelligence that allows them to predict the player's movements. This level of intelligence is not seen anywhere else, and is reported by players as being very difficult to deal with, and often off-putting and "almost human-like".