Vengeance of …

As our … emerged from the Shroud, we discovered that our betrayal had caused a powerful backlash from …. A Shroud Tunnel has emerged near …, which is now a world of endless wastes. We have … a palpable fury beyond the tunnel; our former patron is no doubt preparing its revenge.

The command below will trigger the "Vengeance of …" event in Stellaris:

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

• We must prepare to defend ourselves.
  • … turns into a Shrouded World. A Shroud Tunnel appears near this planet.

Stellaris events fire in chains — one event leads to the next. Here is how Vengeance of … (shroud.11120) connects.