Future expansions.

Unicorns are not amphibians.

Kirins (according to some interpretations) are river unicorns, born in deep water and commanding celestial forces (rain, fog, hail, and the like). If you follow this concept, you could call them amphibians. Kirins are often depicted as similar to eastern dragons to give them grandeur, as they play a vital role in Japanese mythology. But snow maidens definitely don't resemble amphibians...

looks exactly like a kirin if you paint it blue.

Kirins do indeed look very much like dragons, but the developers will always have the above excuse. Although, personally, I like regular kirins more than any dragons. But the sacred ones, not so much.