Ouroboros

System sensors indicate that the extradimensional exploration vessel Kohtalo exited FTL abruptly on the outskirts of the … system, colliding head-on with an orbital comet! The collision was disastrous enough to kill everyone onboard, and has sent the remaining wreckage spiraling in towards the … pulsar. It would appear the comet, not the pulsar was responsible for the Kohtalo's demise, and in our effort to warn them of their fate, we seem to have caused it. Both wrecks now haunt the … pulsar.

The command below will trigger the "Ouroboros" event in Stellaris:

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

• Oops...

Stellaris events fire in chains — one event leads to the next. Here is how Ouroboros (distar.67) connects.