Unicorn Crazy Surprise Series 4. Deep Blue/Purple with white mane and tail and silver horn and hooves.
In 2024, this same series was available as #880065 on the Breyer website. The Copyright date on these packages is 2022, so perhaps these were available 2020-2024. Pictured in the catalog (from both 2020 and 2024) is a model with no socks, still researching if this version was ever released, but it is most likely just the prototype for the marketing photo.