The fact that it was released almost a year before the official release of the TCG has given this card a reputation and a specific market: many people wanted to get their hands on a Lorcana card in advance
Gideon, Ally of Zendikar has been dominating Standard for many months now, and I believe the power level of Gideon of the Trials is very close
The term "defending player" in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking, the controller of the planeswalker it was attacking, or the protector of the battle it was attacking at the time the ability resolves
Dance of Elements weaknesses Five-color decks are particularly susceptible to mana disruption, and overall, you might find yourself in a tough spot without the right colored mana to make the most of your hand
A new ability word, Paradox , was also added as a way to identify whenever a player casts a spell from anywhere but their hand