Gray Goo

After detailed analysis, Officer … has discovered that the strange metallic substance coating the surface of … in fact comprises of billions upon billions of nanites! These nanites are microscopic, self-replicating micro-machines, perhaps created by a past civilization for some unknown purpose. The volume and density of this nanite sludge is remarkable, adding billions of tons of mass to the underlying planet. It would appear these tiny self-replicators entered a state of runaway reproduction at some point in the past, engulfing the planet and everything on it. In studying the nanites, the crew has made some exciting new findings that will undoubtedly aid us in our own research.

The command below will trigger the "Gray Goo" event in Stellaris:

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

• Excellent.