Not only will I draw 5-6 cards, Ill also end up gaining 20+ life
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
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
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
This list tries to mix things up a bit, with Fires of Invention allowing you to threaten the combo at any moment even if you only have four lands on the battlefield