Prepare the Ice Cream Layers: Line a 9-inch round pan with plastic wrap and layer softened ice cream in a rainbow pattern.
Freeze: Set the ice cream layers in the freezer for 2-3 hours until firm.
Create the Unicorn: Roll out fondant and color it to create the unicorn’s horn, ears, and mane.
Assemble: Cover the frozen ice cream with a smooth layer of fondant and shape it into the unicorn.
Decorate: Add the fondant horn, ears, and mane to the cake, making it as magical as possible.
Chill: Freeze the cake again for 1-2 hours before serving.
Serve: Slice and enjoy the mythical glory!