From what I understand:

Carpet of Flowers comes in vs blue decks (obv) at the expense of Llanowar Elves

Against non-blue decks, Natural Order comes in, since Progenitus is hard to deal with.

I'm still unsure about Dismember, maybe this is an out to Grim Lavamancer? I personally like Mortarpod to deal with Dark Confidant, Grim Lavamancer, Canonist (tho I prefer KGrip since it also kills E-plague).