The reason Odin has such a powerful ability is a reference to his recurring summon in the Final Fantasy series, which can instantly wipe out any enemy using his Zantetsuken attack
Later Lorcana League promo cards follow a similar pattern of taking cards from the new set, adding foil, a promo number, and a promo symbol
This deck has some interesting decision points and isn't a linear strategy, but it's also not the most complicated out there - and that's important for a beginner deck
A card's monetary value is typically determined by its demand from players - the more people want it for their decks, the higher its price will go
Y'shtola was chosen for Final Fantasy 14 specifically due to the character's popularity and the fact that she's a spellcaster, though ideas were floated around for a highly customizable Warrior of Light commander, but they had "pretty in-depth executions." All of these sets will be released on June 13 later this year, and given how popular the crossover is probably going to be, you might be best circling that date in your calendar three or four times
It doesn't copy any information about the object the card may have been at any point before it was exiled