Proving Grounds

The excavation crew has finally reached the underground structure. Vast, angular halls and tunnels were explored. A complete lack of adornment made it difficult to establish the purpose of the structure. When … entered the main chamber a deep sound suddenly reverberated. Initially just thundering noise, the sound slowly contorted until an incorporeal voice spoke a single sentence in our language: 'Are you ready?' The booming voice was followed by deep rumble as one of the giant walls slowly slid away to reveal a dark corridor. Our archaeologists eagerly went inside.

The command below will trigger the "Proving Grounds" event in Stellaris:

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

• Tread lightly.