Rainbow Charizard GX from Burning Shadows as well as Rainbow Charizard VMAX from Champions Path are not only some of the most sought after Rainbow Rare cards, but stand among the most valuable cards found in their respective series
While I won't predict what the English version of the card will sell for, especially as things can change quickly from the pre-release sales to the full retail launch, I can all but guarantee the Japanese version won't stick at this price, even if Mega Dream ex is a high-value set - it's a pattern we've seen before
There's a weird potential where you use this thing as a planeswalker tutor by blinking it in and out of play to fetch planeswalkers
Decks that intend to use Magnezonea Stage 2 Pokmonto accelerate Energy in this way will find they need to run a higher-than-typical Energy count in order to consistently hit Energy off of Magnezones Giga Magnet ability, which further cripples such a decks consistency
Its current average price near $50 (raw) and strong graded premiums (PSA 8: ~$119
Obviously, it gets better the more burn you play, but if you play too much, you risk taking too much steam out of Purphoros