yugioh pharaonic guardian booster box Yu-Gi-Oh Unlimited – Baseball Card Exchange Yu-Gi-Oh! Dark Dust Spirit (PGD-017)

The value is absurd

Not only will this mill a bunch of cards from your library, but it will also refill your hand with more adventure effects

Pokmon keeps a lot of its cards inexpensive with many separate variations and making its chase holofoils and art cards focus more on collectability than playability, but sometimes cards that are both competitive and expensive like Mew VMAX can slip through the cracks and cost around $20.00 per copy

Salamence ex SIR #187 ($79.93) Dragon ex (310 HP, Dragon Rush) 18% growth

Its not a huge theme, but Rydia, Summoner of Mist, Garnet, Princess of Alexandria, and Yuna, Hope of Spira are all great payoffs for playing summons