While Ruby Medallion is better all-around (but $14 more expensive), any kind of cost reducer works great with Dragons Approach, especially if you have a way to turn that damage into card advantage with something like Virtue of Courage or Syr Carah, the Bold
Not only that, but the art of this version is so iconic that its still strange to me to see Snapcasters out there with different arts
Hence the reason PSA has been as successful as it has for so long
Ragavan is a card thats seen play in every MTG format where it's legal, and left unchecked, it dominates a game
There have been countless discoveries on E4 over the years
Regardless of how the permanent phases in and out, an important thing to keep in mind is that the permanent does not move to another zone from the battlefield when it phases out, it just starts being ignored by everything happening in the game