I agree that undertaker will be a nice addition to zoo, but do you really think Zombie Chow is going to be viable? It seems like any turn after turn 1 or 2, that 5 heal is just too much of a liability for a deck that needs to burn an enemy down before big threats start coming out. Zombie Chow needs 3-4 turns to be net positive (3 attacks to face to overcome the heal for 5) and likely won't survive that long.
If anything I see Zombie Chow as anti-zoo
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