Aetherize was first released in the set Gatecrash, illustrated by Ryan Barger
If the art box has no "shadow" underneath it, it is referred to as "shadowless" by collectors
In fact, if you can grind your opponent down far enough, you can actually lock them out by returning this with Atzal every turn in their draw step and sacrificing it to its own ability
In the wider games, Gyarados was used to show players what shiny Pokemon were, with a red shiny Gyarados being a minor plot point in Pokemon Silver, Gold and Crystal
But lets put a PSA gem mint stamp on it, and hold onto your hats, because this card just leveled up to super secret battle status, with eBay sales ranging from $598.50 to $2,000