This often means that nowadays, the most powerful cards for non-rotating formats are printed in a supplemental set (rather than in Standard)
For winning we get two Premier packs that feature Bulbasaur on the cover but the second somehow contains a Charizard
Thats a very irritating effect for your opponents, helping to ward off potential threats that might be too costly for your rivals to sacrifice
On top of that, I think green may be the best color to benefit from devotion simply because of how much mana its allowed to make and the amount of green mana showing up in casting costs is a drawback in many other environments
They are more of a Planar Chaos , path not taken vibe, but perfectly legal kind of concept
For example, if an effect allows you to play lands from your graveyard, you can play Garden of Freyalise, but you can't cast Disciple of Freyalise