While not the most efficient burn spell it is reasonably cost, fairly meaty, and still plenty playable
Its a free sacrifice outlet in decks like aristocrats, and it can proliferate, draw a bunch of cards, and remove small creatures all by itself
Mouth is okay
Bear in mind if you want to convert your bulk into more Magic cards, you can usually opt for store credit instead of cash, often at an increased rate
Koll, the Forgemaster Koll, the Forgemaster takes care of your equipped and enchanted nontokens by letting you return them to your hand when they die
While this used to be true, the price of playing Modern has dropped significantly over the past few years, mostly because of the Modern Masters series