Note that this does not apply to permanents already on the battlefield that become a copy of a transforming permanent
Gideons Intervention answers all of those things, and it does so at four mana, making it exceedingly fair.* Ive used this in my Sigarda enchantress deck to stop Aurelia combos, to stop Zacama wrecking everyones collective faces and plenty of times to just name Blasphemous Act a card I see at least 1.5 times per game
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One thing Im hoping for from Kaladesh is a cheap removal spell that is easier on the mana, but until the rest of the set is spoiled, it looks like Grasp of Darkness is the best option
All in all, five mana for something that doesnt do anything on its own is expensive, especially considering you need both creatures and draw effects to make this work, but the payoff is definitely worth it for a focused strategy
Then they reveal the top card and if it's a permanent, it gets tossed onto the battlefield