Careful planning and deliberate card choices determine your deck's effectiveness and competitive viability in tournaments
He grumbled something else unintelligible
Number 35 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (1/25/2019) If the target creature is an illegal target by the time Code of Constraint tries to resolve, the spell doesn't resolve
It still taps for colorless, which is nice, but its almost worse than a random basic at that point
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If you really and truly want to stop your opponent from casting creature spells for a single turn (which is all that Aether Storm will last), you could look at Cease-Fire, Orims Chant, Silence, Brand of Ill Omen, or Ward of Bones
