Unicorn

Unicorn is a new creature added to the upcoming The Sims 3: Pets. It was announced for the first time on The Sims 3 Pets - Gamescom Trailer (Germany).

Unicorns are mystical, magical creatures that can be added into any family. There are two kinds of unicorns: ]
 * Friendly - Blesses Sims and helps with gardening.
 * Nasty - Curses Sims and brings them bad luck. Nasty unicorns can start fires.