Furthermore, whenever an Elemental you control dies, you mill three cards, providing you access to additional Forests you can play
R Rare Dark Contract with Patent License X SPELL Field If your opponent Special Summons a monster(s) with the same card type (Fusion, Synchro, Xyz, or Link) as a "D/D/D" monster you control (except during the Damage Step): You can inflict 1000 damage to your opponent, also, while this card is on the field, your opponent cannot Special Summon monsters with the same card type as that Special Summoned monster for the rest of this turn
With a minimum of only six, it's not difficult to envision a stack that benefits one deck at the table more than the others
For instance, something like wildfire could be played on animals that live in the forest, and cause that card to be removed from the game
If someone is selling you a raw card because it will grade a 10 at slab prices walk away
When the Card is a Real Card The market quickly learned that for Magic, scarcity alone isnt enough