“Invariant ice,” Jedao was saying. “I don’t suppose anyone’s figured out where to get more of the stuff.” Cheris looked at the Nirai, but he was ignoring them. “Not that an infantry captain would have heard,” Cheris said. Invariant ice had the ability to generate shields in the surrounding space. The shields were impermeable to anything but a narrow band of communications frequencies. In principle, a sufficiently strong attack could overwhelm the shields and drain the ice of virtue. But the last Cheris had heard, even fury bombs would not suffice, and those were exotics anyway. “I don’t know
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