Older rare cards have definitely retained a lot of value, as seen by some of the absurdly priced collectibles I already discussed
[39] In November of that year, Rosewater explained that since The List and Set Boosters had been phased out, Wizards was in a conundrum: although they still wanted to create non-Secret Lair versions of mechanically unique cards, they could no longer guarantee that these would always be different from what the Secret Lair had offered
Now, we are not graders ourselves, but we have seen enough cards to eliminate those that certainly wouldnt stand a chance
Like most Magic: The Gathering cards, the value of One Ring to Rule Them All depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Tales of Middle-earth Promos)
In fact, Metal Energy used to be a special Energy type that reduced damage
There are instants and sorceries that make them, like Confirm Suspicsions, Declaration in Stone or Press for Answers