Barriers

Magical barriers block enemy's spells and items to your country. Requiring certain formula and technique, only an Archmage can build a barrier. There's no way to order anything when you are concentrating to build them. Higher rate of barriers will increase the chance of protecting yourself from various kind of magical attacks.

Barriers provide no space for population, vs 10 for wilderness. Building barriers:

• If you build 50 barriers at once you will pay upkeep for 50 barriers for 50 turns at a cost of 75,000 mana in upkeep alone.
• Building them one turn at a time saves you ~37,500 mana.
  • of course the faster you move, the less you risk being attacked while building barriers...

Program Code of Barriers: http://www.the-reincarnation.com/viewtopic.php?f=7&t=17213