Tactical Terraforming

Science Officer … reports that … can indeed be terraformed! A narrow window of opportunity is expected to open shortly, as the planet enters a particularly unstable phase of its cycle lasting a couple of months. … believes that miniaturized explosive charges delivered to the planet's crust and strategic irradiation of the atmosphere during this time will halt …'s tumultuous changes and stabilize it in a form somewhat more suitable for sustaining life. A Special Project has been issued, but we do not have much time.

The command below will trigger the "Tactical Terraforming" event in Stellaris:

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

• Excellent.
  • Start special project: Grimacing Planet

Stellaris events fire in chains — one event leads to the next. Here is how Tactical Terraforming (anomaly.231) connects.