While itll take some reps to understand where and when you can go off, the how is relatively easy: make a bunch of mana with rituals, cast cantrips to run up the storm count, mix in a Past in Flames, and then put a lethal number of Grapeshot copies on the stack
Lets set up with the basics: When you get to the this slot in a Collector Booster, youre going to get a Showcase (In this set, thats the Monster Manual), Borderless, or Extended-Art treatment in foil
Dark Ritual Generating 3 mana for the cost of 1 seems innocuous at first, and Dark Ritual is card disadvantage
Also coming on December 1, alongside the new Lorcana release, is a premium collector's edition pack of cards from sets one and two
You could force something to block Nemesis, or cycle a Jund Sojourners, or sacrifice a Goblin Arsonist