If the deadly Silence race failed, then normal races would appear next. And so building the entire defences only to stop the Silence race using the arrays would end up quite bad for my forces in the end.
Isac was puzzled and didn't know what to do. By what she said, she was trying to make up spaces for the ferocious nature of the deadly attack of the star arrays.
I liked the name she gave to these arrays, star arrays. However I reassured her that using the fifth and deadly type of attack would only be when the enemy was crushing our defences.
Trying to activate the fifth layer anytime the enemy would appear meant the entire defences would be quite useless.
It wasn't just impossible to build defences based on the range of effects of the star arrays, but also it'd exhaust tons of bones without getting any in return!
From the fierce nature of the fifth technique, I knew without the need to test that nothing would be left behind to collect.