As an example, Emchompite says that cards that were included within Japanese sets, like the Secret Rare Yveltal EX from Best of XY, but as promos in English, are usually more expensive in Japanese just due to the nature of their release (i.e., having to pull the card from a pack vs a guaranteed promo card in a product)
This would not include any custom art and be a normal order
However, for now, it's Scyther, with this Holo ranging from $20 in HP condition, with multiple NM sales exceeding the $50 mark to build a solid market price
Not only is this a big creature stats-wise, clocking in at 5/5, it also gets +2/+2 as long as you control your commander
That said, the upcoming set emphasizes adventure more than any previous release