Valgavoth is essentially unkillable by phoenix
You get to draw cards, and with one of the best colorless ETB effects in the game you get protection from everything, which buys you time to actually put your cards to good use
They seem very strong, but drastically increase the price of the deck, and I'm not entirely sure they are better than what we're already doing
Ghostfire Slice Kozilightning Bolt here is awesome against specifically Domain Zoo and maybe Omnath right now
The reason its not ranked higher is because Wilhelt sees no competitive play in any format (EDH excluded), but a zombie commander that can both generate sacrifice fodder and provide a sacrifice outlet for said fodder offers a lot of flexibility for casual decks
This strategy runs the risk of being overwhelmed early, but if you survive into the late game youll be very very hard to beat