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. Our analysts conclude the Kohtalo's negative mass-based FTL drive was incapable of accurately predicting where (or when) they would exit subspace. 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:

• Perhaps it was unavoidable.

Stellaris events fire in chains — one event leads to the next. Here is how Ouroboros (distar.68) connects.