As a reminder, this can also be a tricky upgrade for Changeling decks since most of your creatures will trigger Freerunning
Questing Beast was a lethal threat against planeswalkers that was often called a "mini planeswalker" due to how much utility it had for a 4/4 with impressive keywords
The natural inclusions in any deck playing Darcy are Mishras Bauble, Unholy Heath and, if paired with Blue, Expressive Iteration and Counterspells
Zoro's strategy is pretty straightforward, making him easy to play for beginners, and his aggressive approach gives him a good match-up against some of the stronger decks in the meta
Take a couple of things you know work Mono-White Aggro creatures and the Jeskai Cycling lightly tri-color mana and splice in the new mechanic
There are plenty of Greek myths about ghosts and spirits, but Ive never encountered anything resembling the modern notion of a zombie