With Atraxa out, you can continuously gain and keep ticking up your energy count, letting you use them for other effects with less of a chance of running out
That being said, the Amber and Emerald deck isnt bad per se
That said, since you have to discard the card at your next upkeep, it means that if you play it turn 2 you will need a madness card for 2 or less mana to be able to play it
To make things more confusing, some cards in certain Commander sets could only be found in the (non-draftable) boosters for the main set, and not in the accompanying precons
In the cube he is at his very best with sac lands and the like filling up graveyards with lands to eat and his two other tap effects come in incredibly handy in a wide array of match ups
Your cards are worth of what they usually are, as for every card you draw in your draw step, your opponents draw a collective three