Conflux delivers Devour evolved a bit mechanically with "threshold 1 devour" and "picky eater" bonus (which was actually my original devour design)
Even the base printings of Gemstone Caverns are worth around $50, so no matter what, you'll be happy to open a copy, and very, very happy if you happen to open Gemstone Caverns #51.
Good cards which are playable in both types of format keep your collection flexible enough to play a variety of ways
And at the top end weve got some bangers: Bazaar of Baghdad, nostalgia captain Juzm Djinn and Library of Alexandria
Also, do not forget that you cannot use these cards in tournaments, as they are not considered authentic
Its just very hard to argue with a big old group of Creatures that are massive, flying, and keep becoming increasingly numerous