#6: Llanowar Visionary Ive always said that my favourite card in Elves was Elvish Visionary (to the point where Im a little sad most Modern lists have cut it)
But It turned out to be far more powerful than anyone could have expected, and it was swiftly banned in Standard, as well as several other formats
Pull or trade more Jafar Newly Crowned and Iago Giant Spectral Parrot and the other Illusion cards for these spots
Finally, Nissa loses the heads-up battle in the mid-game to the other popularly played planeswalkers, Gideon, Ally of Zendikar and Chandra, Torch of Defiance
Prophet of Kruphix Hey, if you get banned in one of the most permissive formats allowed in casual lands, then you are going to hit high on this list
But there are also aggressive mana sinks to help generate pressure out of nowhere, with Equipment in every color, powerful Class enchantments to buff your creatures, and pump abilities on the creatures themselves