While Wizards and SQEX decided to strike a balance between the two, in the end, we landed on putting slightly more emphasis on the "accuracy" side of the spectrum and trying to make the English and Japanese match as much as possible while localizing to match each audience
These are permanents that can only exist on the battlefield, and once they leave they will go away
Creatures are more expensive than life a lot of the time, which is why this beats out the Deadly Dispute group of cards
However, a spell build could exploit this card further through copying and recursion
If you want to use this to repeatedly recast Lion's Eye Diamond, you'll still need a way to mitigate the five life you pay for each loop, and you'll need a win condition
When two cards are exiled and melded, they each leave the battlefield, then return together as one new untapped object with no relation to either of the objects that left the battlefield