We developed it at the same time Outlaws of Thunder Junction developed spree, so there were discussions about which approach was best
That's a pretty good balancing act
It gets a counter each time any creature dies, and can then remove those counters for mana
[A Dancer is] kind of a support character, buffing each other, so its card itself comes down with a hero, but it also puts those abilities on your commander, just like in the game. Final Fantasy XIVs community is a driving factor in the development of the Commander Deck
And yes, the doubling from Unbound Flourishing makes Zaxaras tokens even bigger
With the Ursula's Return expansion, this power became especially problematic, and Disney Lorcana is now taking steps to address the problem