The Blue Back cards were the first printed, so they fetch a higher price
To meld the two cards in a meld pair, put them onto the battlefield with their back faces up and combined (see rule 701.34, Meld)
Youd think that the artists would be given some inkling about the effect of the card to help them match the art to the card, but thats not the case, as Fackova explains: The brief doesnt describe what the card will do in the game so we dont specifically know the mechanics when we work on the art. The brief I receive specifies the colour(s) the card will be associated with, what plane it exists on, the requested subject matter, and any features theyd like to be made prominent, adds Finnigan
Since control decks hit most of their land drops and extend the game, it's fully possible to look at 8-10 cards when you cast this in the late game
For example, Umbreon ex SIR is a ridiculously hard card to pull, and if you're trying to do just that it could cost a phenomenal amount of money
You can only activate 1 "Prologue of the Destruction Swordsman" per turn