As for playing with Wilhelt in the wider format, I think its actually a really great option for Zombie decks, especially seeing as though you can lose a whole board of Zombies and get an immediate replacement board of decayed Zombie tokens
Once Deadeye Navigator arrives, it costs but two mana to blink your Navigator or the creature it's bonded with, sloughing off targeted removal, combat damage, or anything else that threatens them
Cases don't lose their other abilities when they become solved
This will kill with CCs like Blood Artist and Zulaport Cutthroat and then net you triggers with mono-Black CC fun times like Grave Pact
4 Petit Moth To start, this is basically Caterpie
In control decks it offers the necessary protection and time to develop, and in aggro decks it clears the way for creatures to attack