In terms of which cards are most important, and how you can maximize their impact, here is what you need to know
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Day of the Dragons (Onslaught/Legions/Scourge) The first rare "bomb" on this list, Day of the Dragons turns all of your creatures into 5/5 flying monsters
Malamet War Scribe Rating: 5/10 Weve seen plenty of this effect in the past on cards like Ampryn Tactician and Dawnfeather Eagle, but none of them gave +2/+1, which is actually a much bigger buff than you might realize
For me, the tipping point is in the card type creatures are just much better than sorceries, adding the utility of attacking and blocking, paying sacrifice and convoke costs and everything else you need a body for in Magic
Phyrexian ArenaPhyrexian Arena is fine, but why settle for it when there are more consistent options