My idea is Laser Doors. It's the upgrade of normal doors. Attack all bodys if contact.
The recipe:
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Posts by XnetRoidPL
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Force Field Armor can be use like composite armor but the FFA can be charged (Indestructable!!!).
Recipe: --- 
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I have idea to speed destroy arena and i have idea to mobile terraformer!!!
This is copy of terraformer and you can destroy like 20x20 area in 1 second with using one charged lapotron crystal, any TFBP and mobile terraformer.
Recipe:
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-cable -advance circuit -lapotron crystal (no charged) -terraformer