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)
You also may encounter special serialized Doctor cards in Collector Boosters
Card Set(s) -Anime 25th Collection- [EB-02] CARD VIEW EB02-014 | C | CHARACTER Sarfunkel Attribute Wisdom Block icon 3 Effect [On Play] Play up to 1 [Gaimon] from your hand
does anyone have confirmation on the Target and Walmart promo
Sphinx Summoner Ah yes, the heavily reprinted Sphinx Summoner
Win a Charizard Celebrations PSA 10