Dark Flow

Examination of the … gateway did not proceed as anticipated. With sensors registering gravitational influence orders of magnitude beyond expected values, Officer … chased the source to the very center of the derelict spacetime conduit. What they found there appears to have changed them. For days following their return, … spoke of massive, indescribable structures of matter in the void of space far beyond any stars. Exerting an inexorable gravitational pull, … claims our galaxy streams helplessly, inevitably towards them. The mission has left the team shaken, no less for the fact that shortly after the experience in the conduit, the abnormal readings suddenly stopped.

The command below will trigger the "Dark Flow" event in Stellaris:

When this event fires, you can choose between the following option:

• Disconcerting.
  • Physics: +None to None