What do I need to clear the star hidden event?

What should I ask the AI?

Once you've almost finished purifying the land, there should be a star on the edge. This is my second playthrough, so the map might be a bit different from yours, but it seems like it should be in that spot on the top left.

Wow, there are people who play this for a long time. It wasn't really my style, so I gave up after playing for a bit lol

This game was too hard for me too, so I gave up lol

The stars are awkwardly different sizes, so I can never tell just by looking lol. Props to those who mine the event areas all the way to the end! +_+

There's a star near the end. You can use that~

You can find capsules at the end too. You can purify all the land without spending money, it's just tough haha

Wow, there are people who can clear this all! That's amazing!!