These are referred to as Master Ball Reverse Holos and those portraying Eevee and evolutions in Pokmon TCG Prismatic Evolutions (with the exception of Umbreon and Sylveon) are among some of the most expensive ones in Terastal Festival Ex , according to Pokebeach
Each ranking has four different tiers to it and you work your way from Bronze to Silver and so on by winning matches
Personally, I feel Isshin pillowfort is a trap
Something awful happened on that day
You need a lot of smaller artifacts in your deck in order to maximize Drix Interlacer, but with lots of zero-mana artifacts, like Ornithopter and Mox Amber, as well as artifact mana rocks that easily replace their mana values, like Springleaf Drum, Drix Interlacer can become a powerful payoff for the Affinity archetype
Interestingly, Raichu is a popular choice among rivals as well