If this results in an illegal block (the example the card gives is a non-flying creature blocking a flying creature), then that block doesn't count
While the Princess characters readied using Moana, Of Motunuis We Can Fix It ability cant quest for the rest of that turn, this means you can use them to quest first, before readying them up to avoid being challenged by your opponents cards - or to be able to quest and challenge on the same turn, which presents huge potential with the right deck
All in all, many of the cards in the Final Fantasy Crystal cycle look like great inclusions to specific Commander strategies
But I soldiered onward and battled
Put X +1/+1 counters on it, where X is that spell's mana value
It sounds crazy, but it almost seems very doable for one to collect the vast majority of the cards barring the ridiculously expensive top end ones if theres actually only around 10,000 cards