At present, washing stones can only be purchased by lls in shopping malls. After the Holy Spirit is upgraded, it can be transformed (recycled) and can be continuously upgraded.

Quick upgrade method for novices: The soldiers trained by each race are different, and the technical upgrade order of soldiers is also different.

The fifth technology and the eighth technology of all arms will be promoted when they have time, and they will not be promoted when they have no time. They are not very useful. The fifth technology is to speed up the treatment of soldiers' injuries, and the eighth technology is to reduce the resources used to recruit soldiers.

Dwarf: In the early stage, soldiers gave priority to upgrading mecha and rocket soldiers. If conditions permit, all weapons can be upgraded to unlock nomads.

Lich clan: The skill of early warriors was upgraded to that of skeleton warriors and wizards.

Raccoon: In the early stage, the skills of soldiers mainly improved the skills of warriors and crossbowmen.

Terran: Soldiers are upgraded to swordsmen and archers, and priests are upgraded.

Goblins: Master the technology of improving deer riding and demon bow.