While the "ease of flipping" category is, in large part, a product of the number of defense counters on the battle (battles range from three to seven defense counters, and a battle with three defense counters will be much easier to flip than one with seven), it also takes other factors into consideration, like whether the battle makes creatures (if so, we can use them to help defeat the battle, making it easier to flip) or whether the battle acts as removal (which can get a blocker out of the way, making it easier to attack and defeat the battle)
It's the cornerstone of red decks in multiple formats
Compared to printing your own MTG proxies at home, this is a completely different scale
With the games rapid international growth, demand for rare One Piece cards has skyrocketed
We Say Thee Nay
Were outright told that the chance of a serialized Realms and Relics, of which theres 3000 total, is 0.2%