The deck plays 12 creatures with the Undying mechanic. It basically means that if the creature dies, it comes back with a +1/+1 counter. In the deck you can see some cards which are pretty weak on the surface – Geralf’s Messanger, Young Wolf, and Strangleroot Geist.
Why would you go through the hassle of playing tutors and individually average cards? To kill your opponent when they are unprepared! Here comes the namesake – Yawgmoth, Thran Physician. He sacrifices a creature to put a -1/-1 counter on a creature and draw a card. With 2 creatures with undying you can perform the loop of:
- Sac an Undying creature, it combines with a counter, draw a card.
- Sac the other Undying creature and put a -1/-1 counter on the first creature, draw a card.
- Sac the first creature and put the counter on the second creature.
This way you’re shuffling between two undying creatures and minus/plus counters. However, each iteration costs you one life. If one of those creatures is Geralf’s Messenger, your opponent will lose 2 life per loop – if your lifetotal is higher, they die.