[BigDaddy]

You can use crossbreeds in large enough numbers to "cast" poison cloud on large armies, especially useful for merely defending unimportant provinces.

Squirrellord: As much as I respect that opinion, dragging a players large army through a poison cloud as the chase down retreating crossbreeds is very cheap, often even if you lose the hydras. =BUT YOU DON'T HAVE TO LOSE THE HYDRAS!=

The small ones are more useful and harder to target.

I was always disappointed by them too, but I found something specific they worked against... Abysia?