@JeremyECrawford can a druid use a wooden shield, club or staff as a druidic focus?

— James Bovay (@jamesbovay) January 21, 2016

A druidic focus can take many forms (see PH, 151). Consult with your DM to choose one that's appropriate. #DnD https://t.co/LdkHhzoVeM

— Jeremy Crawford (@JeremyECrawford) January 21, 2016