The Monster Manual describes unicorns as creatures with “a single spiraling horn of ivory whose magical touch can heal the sick and the injured. Its ears catch the words and whispers of the creatures that share its domain, and it knows the tongues of elves and sylvan folk. Unicorns allow good-hearted creatures to enter their woods to hunt or gather food, but they hold evil ever at bay. Foul-hearted creatures seldom leave a unicorn’s domain alive.”