Mana Burn: Cards like Charizard ( Genetic Apex ) require you to remove (or figuratively burn away) their energy in order to attack
Sure, most of the time, you'll roughly break even in terms of value, but by buying every drop, you guarantee that you'll end up with the drops that are worth significantly more than their cost as well
In this case, all cards have black borders, and an Acorn logo marks which of those cards arent tournament-legal
And it flies and has the right toughness, but it's a bit harder to cast with triple Blue and may not be castable when you are on six mana, but it's still pretty synergetic here
Turns out she was 100% correct
Many of the best sacrifice outlets are just ways to exchange tokens for mana or cards, and you need to get considerable fodder in play to even set those up