A magic one!! :)
They are mythological (not real) so can be any breed as it is usually not specified but they are usually depicted as white.
He is most likely an Andalusian or lusitano.
The antonym of a unicorn could be a horse.
Oh, dude, I mean, technically speaking, if you breed a unicorn with a unicorn, you're probably gonna get a unicorn. Like, that's kind of how genetics work, right? Unless one of them is secretly a horse in disguise or something, then you might end up with a horse with a horn, which is just a weird unicorn wannabe.
Either half horse half Unicorn or a Unicorn or a horse. Hard to tell. A DemiCorn.
Unicorn
you get a unicorn
A horn.
unicorn
pony or unicorn
A Unicorn is a cross between a horse and a drunken douschebag from Denmark
Unicorn
Unicorn