Ill put some of the highlights in order, then gold, just for people to know what they can expect out of these: Kenrith, the Returned King Akroma's Will Urza, Lord High Artificer Counterspell Cryptic Command Rhystic Study Yawgmoth, Thran Physician Bolas's Citadel K'rrik, Son of Yawgmoth Ragavan, Nimble Pilferer Ancient Copper Dragon Primeval Titan Atraxa, Grand Unifier Tymna the Weaver Isshin, Two Heavens as One Thrasios, Triton Hero #45
Unlike most precons, Counter Blitz even includes an infinite combo with Walking Ballista, Hardened Scales, and Gatta and Luzzu
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He finishes with this sentence: "Take that as an indication when you're in doubt, you're probably better off adding that extra land instead of that extra spell to your deck." I'm going to continue to advocate for 40 lands, because I feel being relevant in the game and having a deck which reliably casts its spells is superior to the alternative