Look at the top three cards of your library, then put them back in any order
If you attack white or block white, your creature has gotten itself involved in the fight and thus it's okay for white to destroy it
Since Persistent Petitioners is a Human, and you can use them to mill yourself, the strategy is simply to throw a bunch of Persistent Petitioners into the deck alongside a bunch of copies of Slime Against Humanity, mill yourself out, and then play more Persistent Petitioners to cast those copies of Slime Against Humanity from the graveyard
Not because it is powerful, but because it shuts everything down
He had preordered a collectors box of the Lord of the Rings Magic cards that he was planning on picking up from Face to Face Games in Toronto
Dimir and Izzet builds lend well to drawing more cards, and the flash gives you an element of protection and surprise