i think that if you really wanted to portray the word fantasy you would have needed to add a whole bunch of fantastical beasts instead of such a specific one - which doesn't get the message through.
Forget literal or symbolic, my friends and I are all over that phrase "it's my unicorn!" for whatever rocks. The design on its own is skilled simplicity, but the phrase and image will outlive trendiness! Music is my Unicorn! taco Bell is my unicorn and this T-shirt is too!
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