Gathering An Army
That was indeed a problem! He also said that as long as I didn't send any force out, my world would always be protected by an invincible layer of shield. But if I tried to send anyone out, it would be seen as a declaration of war, announcing my readiness to attack others and get attacked.
That meant the moment I'd move, I had to not scout and just strike. I had to absorb worlds to mine, adding more territory there so I'd be able to increase the size of my world and get more forces inside.
There were also different techniques for building villages, towns, and cities. There were also others to build forts, towers, and other war facilities.
All this depended on the size of my world, and the amount of energy there. That made me realise what I did so far was worth it!
I let my world absorb tons of energy all this time. And that meant the amount of energy inside was enough to build many buildings.