The enemy will use the Fire weapon against you alot. If you don't know it's the technology that has a pointing finger and like a little bomb icon. To get this tech yourself, you must build a level 3 breeding house I think. That is the Red line of house building. Once you get to the large house, the Fire tech becomes available. I always tech Fire all the way to level 3, because then you start with level 1 Fire on the next stage. So as long as you keep maxing out Fire every stage, you'll always have it available at the beginning of each level, then you don't need to worry about building a level 3 breeding house.













