Vultaum Colony

Several large, perfectly circular lakes on the surface of … were caused by a series of massive antimatter explosions several million years ago. This … was inhabited by the Vultaum at that point, and the craters are all clustered in the region that housed their largest planetary settlements. Orbital bombardment has been ruled out by the science staff on the …, leading us to believe that these explosions were triggered by someone or something on the ground.

The command below will trigger the "Vultaum Colony" event in Stellaris:

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

• Astounding.
  • Start special project: Metropolis