You have all the flexibility here: if my math is correct, there are eight different options
Heliod, the Radiant Dawn is a very straightforward commander in this way, costing a fairly cheap four mana to transform him, or three mana and two life, to compleat the poor god, turning him into a twisted, Phyrexianized version of himself
You could even beat the Grand Masters multiple times to add multiple copies of a card to your deck
Eeveelution-focused artwork
This cards price skyrocketed since it was only available by winning a short lived 3-on-3 official tournament
The total number of these that will exist can be seen below: 300 Serialized double rainbow foil Sol Ring (Elven) 700 Serialized double rainbow foil Sol Ring (Dwarven) 900 Serialized double rainbow foil Sol Ring (Human) 3,000 Non-foil Sol Ring (Elven) 7,000 Non-foil Sol Ring (Dwarven) 9,000 Non-foil Sol Ring (Human) For those looking to get their hands on a copy of The One Ring, use this handy chart to track down the packs to crack