Floaty Birb<p>considering how much damage invasive species can do to an ecosystem, and since a lot of settlements in <a href="https://mastodon.social/tags/spelljammer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spelljammer</span></a> are probably little garden asteroids with fragile air envelopes, maybe carrying *normal* rats (plague optional) would be an effective weapon system.</p><p>A space galleon rolls up to a farming asteroid and unloads a lot of rats. The rats eat the crops and everyone starves. Turns out that the galleon was in the employ of a necromancer who wanted more bodies for her skeleton army.</p>