Yusri, Fortune's Flame also has a coin flip ability, but the way this ability is designed manages to make you both try to avoid losing flips while also flipping as many coins as you can
When you consider that many of the Zombies have Exploit and other powerful sacrifice effects, Necroduality will provide good fodder of creatures and powerful combos
Airbender Ascension Airbender Ascension is an interesting blink package
Its not my first choice for straight-up selling cards, since Cardspheres economy usually revolves around buying and selling cards at lower than market price (you can trade people cards for 50% of their value, but you also receive cards at a discounted rate, for example)
I firmly believe that given the soapbox that Sheldon and the other members of the Rules Committee have an article extolling the virtues of playing with un-set cards and a sincere personal recommendation to try it would have been enough
Debut set The First Chapter has no cards that interrupt your opponent during their turn or shut down their actions, leading to a simpler division of each players actions that makes it less complex than other TCGs timing-based strategy