One, for example, gives the player who rolls Chaos a 7/7 colorless Eldrazi token which forces a defending player to sacrifice a permanent when it attacks
If you tap four untapped Persistent Petitioners, it will cause your opponent to mill 12 cards
Additionally, the flavor of the Ice Age present in Ice Age and Alliances is a favorite of many of us here in Nashville
As you can see with Druids, that mostly meas messing with lands, either playing extra lands (which is pretty great) or turning those lands into creatures as most druids do once they get access to Awaken
Its a commitment. We can dig it
Overall, Amethyst, Ruby, and Steel are more focused on attacking while Amber, Emerald, and Sapphire are more supportive, but each can be used to make interesting combinations and people can experiment with seeing what strategies work with their personal play style