I personally love making good use of Iridescent Vinelasher and Ob Nixilis, the Fallen
If the target of Surgical Skullbomb's last ability isn't a legal target as the ability tries to resolve (probably because it has left the battlefield), you won't draw a card
Against Aggressive decks, Karn, Treasure Map, and Arch of Orazca are enough to generate card advantage in the matchup
Vigilance keeps it available for blocking, too, making the Prophet a steady value engine that rewards you for committing hard to the zombie plan
If so, then this is a lockdown card for planeswalker, and that's why we see planeswalkers in the trap
Ursulas Return adds further versatility to the strategy in the shape of Diablo who lets you draw cards whenever your opponent does, as well as thanks to CriKee