These Prerelease promos do not appear in Collector Boosters: if you want one, you should participate in a March of the Machine Prerelease event
Spike: Competitive players that play to win Will play whatever deck wins Johnny/Jenny: Creative deck builders, like to win with cards no one else uses Enjoy combos, and enjoy deckbuilding (at least as much as playing) Timmy/Tammy: Likes impressive cards (big creatures, splashy spells) Cares more about the quality of the win A while back The Command Zone podcast released an episode on power level, which Ive summarized below
Once Jumbo Cactuars 10,000 Needles ability triggers and resolves, you can pay the three mana to sacrifice the Cactuar to Jarad to make each opponent lose 10,000 life
An unanswered Goblin Lackey can quickly close out a game
Normally this ability would be there to make up for insane stat lines, like a 1-mana 3/3 flier
Two of MTG Arena's top-performing best-of-one decks are Azorius Soldiers and Mono-White Soldiers, both of which have considerable crossover in their decklists