Fig 1, the Shev'ka'un (or Shev, if you don't have much time).
This object is something that ejects anything that falls in, but whatever that thing is, it ages a lot by the time it escapes. But, to us, it goes in and out instantly.
Like a black hole, it has a strong gravitational pull that captures hot gas and subjects objects to extreme tidal forces.
Unlike a black hole, it does not cause BHIP.
Like a pulsar, it spins quickly (403,555,294 hz).
Unlike a pulsar, it emits amplified versions of radio signals that fall in, instead of static across multiple wavelengths.
However, the age of signals we've beamed in have been a few seconds old by the time it gets to the event horizon(?). When they come out, they range between 1 year old and 900 billion years old. That is between 0.0000000137 and 65.69 times the age of the universe. For this reason the Confederacy of Humanity has it classed as an anomaly. This, however, does not pose much of a risk towards vehicles built for class B activities as it's actually safer than normal black holes - refer back to line 3.
Probes getting close to the Shev'ka'un do not observe time dilation like with black holes, but time runs normally everywhere despite the strong gravity. Perhaps it is capable of splitting the fabrics of space and time apart, allowing time to run independently of space.
One expedition was sent into the Shev'ka'un to see what was inside. As everyone knows, FTL ships can escape black holes and power past the 1>c spacetime current, assuming measures are put in place to prevent BHIP. This is shown in fig 2, a penrose diagram. The upper portion represents the interior of a black hole, and the lower portion represents outer space.
Exp-1 was commanded to warp away as soon as it had spent 10 seconds falling inside. But, instead, as soon as it hit the cloudy red barrier, a piece of debris flung out near the speed of light according to nearby doppler sensors. Once a ship matched velocities with the debris, it had turned out to be that expedition. The Exp-1 debris clocked in at 3,000 years old, meaning that the crew had long gone before they got to leave the Shev'ka'un. Further analysis show that the crew of genetically modified humans (lifespan 2,500 years) survived until the year 2,000, when something hit the ship at quite some speed. Debates still occur over the cause of this.
Since then, it has been made illegal to go near the Shev'ka'un. Alcubierre warp drives refuse to target the object unless you are a member of the confederacy of humanity with clearance level Z or higher.
To prevent citizen-class ships from going to the Shev, the system is not included in SCART by default. Those with a high enough perms and the 0.990 version of SCART can download this file and insert it into the addons folder to access the Shev system in SCART.