Dark Sun: The Scorched World of Athas
Renowned for their grace and beauty, unicorns hail from the Lands Within the Wind but have been extinct on Athas for several thousand years. In their homes they often guard forests and lakes. Some mortals hunt unicorns for their horns, which are reputed to have powerful healing and magical properties.
A dusk unicorn makes piercing attacks with its horn and can charm its opponents so that they will not attack it. Its horn can also heal its allies with a simple touch.