That $70 figure could become $250 in the blink of an eye
Its not a great loss to not have a coin, as most Pokemon fans, unless theyre very new to the game, will have a number of coins laying around (and not likely to be used in games for the most part!)
Mega Darkrai is already the face of the booster, so giving it the Mega Hyper Rare treatment only reinforces how heavily the set is built around this Pokmon
Crackle With Power is costly but worth it, dealing massive damage to targets of your choice, perfect for closing out games
You could certainly purchase a played copy of these cards for a lesser cash investment
Mana Confluence + City of Brass Paying 1 life for a mana is a lot, but Mana Confluence and City of Brass make it worthwhile for perfect fixing