For griffons, their native land is the grass; they get +1 to morale there, and it's very likely to be found there, but in the metro, it's rather an exception; morale can actually be lower for them there, as it's the native land of the troglodytes, and they get +1 to speed, which, combined with the miner skill, gives the troglodytes a speed advantage over the griffons... that's what I meant!
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