When you play it early, it creates lots of tokens to build out your board state
Heroes have both natural abilities and the gods favor, after all
Those touches of gold add not only a neat color contrast, but they also enhance the whole, dreamy atmosphere
For decks with more colors, I tend to opt for what makes sense: Purple for Jeskai, and Yellow for Gold decks with lots of colors
Depending on your stance, this either dilutes MTG or makes it more accessible
Furthermore, Japan Showcase cards can also appear in Traditional Foil and Fracture Foil, with the latter being one of the most exotic (and valuable) treatments seen in Magic: The Gathering as of late