How to tell the rarity of the item

It looks like that the demo does not support multiplayer (but the full game will).

There's also support planned for four player multiplayer via online and LAN.

Source

Here is my observations from playing with darkness trap for a few rounds:

• All enemies within the darkness trap cannot attack with the following exceptions:

  • Ogres can still attack through it
  • bosses ignore it as well
  • Assassins can jump out of it and attack you
  • It WILL prevent kobolds from detonating for a short while even after they have lit their fuse. But if you attack them they'll still explode.

• If it happens that you upgrade a trap so it eventually covers the edge of a crystal, enemies will not attack the crystal either because of #1.

• Enemies will just bunch up near the traps and die >:). The enemies don't seem to try to move and find another path, they'll just cluster there and take constant damage until they die. Ranged units outside of the path will still attack.

And lastly, it affects any enemies within the cloud. If you are standing within it, things outside can still shoot at you and see you.