Unicorn

Unicorns are a mythological equinoid animal very similar to the horse but with a long horn protruding from between their eyes and several other minor structural differences. They are generally held to be stronger and more spirited than horses. In several of Harry Turtledove's fantasy series, unicorns appear. In both the Derlavai and War Between the Provinces series, unicorns are domesticated animals and are used in warfare by all combatants. In Derlavai, the unicorn exists alongside the horse, while in Detina it appears to have replaced the horse altogether, though it still coexists alongside the donkey.