The toughest will surely be the five, but those last couple of digits ought to go by in a card or two
A limited number of both double rainbow foil and non-foil versions can be found, though double rainbow foil versions will be serialized with different total counts: 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) The One Ring one-of-one promotional card will only be found in an English-language Collector Booster, while the Rings of Powerthemed Sol Rings can be found in all languages of Collector Boosters
The Elder Dragon War This saga is interesting because its one of the best uses in the set of the read ahead mechanic, because s the saga with the most even split between times you want to play it on 1, 2, or 3
Reddit has some general proxy subs, and there are some for MTG proxies specifically, too
The important distinction is whether the effect gives you a specific time window or opportunity to play/cast your card
