Haunted Tunnels

After mapping the extensive underground network of …, our … realized the tunnels closely match the structure of the Tiyanki vascular system - but on a planetary scale. The pulsating walls emanate a soft warmth, the temperature slowly increasing as the expedition approached the planet core - where our scanners have picked up a faint life signal.

The command below will trigger the "Haunted Tunnels" event in Stellaris:

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

• Fascinating.
  • Society: +None to None