how to tell if mtg card is rare Rarity should not determine the power level, and we will never end up with mythic rares being simply the most powerful cards in the set" Understanding Card Rarity in MTG:

This is a powerful combo line, but to set it up, you do need a creature in play to offer up to Polymorph

This is the kind of win you can tell stories about

If you flip a second Illuna, you can add it to hand and then mutate it onto the first one for a double trigger (and no legend rule!) Its harder to see exactly what to do with Vadrok, Apex of Thunder , since one of the best spells in Jeskai to recast Deafening Clarion will also kill Vadrok unless you mutate it under something with better stats

If a card with basic landcycling is in your hand, you can pay the basic landcycling cost and discard the card

Of course, little else is known at this stage, but what we do know is very intriguing, especially as were able to make such educated guesses about whats next for Disney Lorcana