Gasses Stripped

We were able to repair a few of …'s damaged planetary thrusters and calibrated them to exert equal force in opposing directions. Once activated these powerful fusion devices drew up hydrogen at an exponential rate, burning away the planet's gaseous atmosphere and exposing its mineral rich core, albeit at an extremely high temperature.

The command below will trigger the "Gasses Stripped" event in Stellaris:

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

• Impressive.
  • Chthonian Planet modifier added
  • Engineering: +None to None
  • Physics: +None to None

Stellaris events fire in chains — one event leads to the next. Here is how Gasses Stripped (extreme_frontiers.385) connects.