Princess Stardust

Princess Stardust, Be Careful What You Wish For, is a Unique Unicorn found in Whimsyshire and Whimsydale in of Diablo III.

In combat, she has Illusionist and Electrified affixes. She can also fire a volley of arcane bolts in front of herself.

Trivia

 * This monster has a unique color scheme.
 * Like other Unicorns, this monster is a possible reference to My Little Pony.
 * The name and title also seem to be a reference to the "Stardust" 2007 film, particularly to the dialogue about being careful with the wishes.