Pokmon card value is determined by: rarity (limited print runs), condition (PSA 10 commands premiums), historical significance (prototypes, trophy cards), iconic status (Charizard, Pikachu), grading (professionally authenticated), and market demand (collector and investor interest)
Every time Subordinate deals its full damage to opponents, that covers spells up to a mana value of nine with Abaddons ability
Lastly, if you have highly-valuable cards in your Commander decks and Cubes, I recommend double-sleeving
I also collect the cards
It scores highly on all three of my values
Prismatic Evolutions has booted all expectations out of the window when it comes to how popular a Pokmon set can be at launch