If your Pokemon card has the 1st edition symbol , as shown above, anywhere on your card, you could have something worth a lot of money
Terastodon, Woodfall Primus, and Primeval Titan are probably the best cards for the "big green creature" role, but Simic Sky Swallower and Broodmate Dragon can serve the role as well, although they require greater deck manipulation to be able to hard cast should you draw either of them before finding your Natural Order
Throw those into the mix, and there are over 600 cards to collect - it's bonkers
#3 M Rayquaza EX (Shiny Full Art) Set: Ancient Origins Increase: +$51.12 Current Market Price: $435.32 This card from 2015 has been on a steady upward trajectory since the start of the year
As one of the most valuable cards from Dragon Frontiers, Mew Star can be difficult to find, causing massive shifts in TCGplayer sales data