One of the only cards on this list that was actually designed to be expensive, the hunt for the one-of-one One Ring was heavily marketed, and its prestige drove fans from around the world to open Lord of the Rings packs, praying they would be the lucky ones to find the elusive artifact
This card is part of the Lord of the Rings Online set of cards released by Decipher for their online-only LotR-TCG game product, and was never produced physically
Claws of Gix Claws of Gix still translates mana to life, but as a sacrifice outlet that gets any permanent
You can pay additional costs such as kicker costs
On top of that, even though it takes Darkness Energy to attack, it is a Fighting-type Pokemon due to its Tera-type, and that has some layers of depth that can be quite strong
For comparison, Proxy on the left, real on the right and couple of other proxies below