Add to it that you can play removal in a mono-blue deck and you get a hell of a card
If a creature with persist that has +1/+1 counters on it receives enough -1/-1 counters to cause it to be destroyed by lethal damage or put into its owner's graveyard for having 0 or less toughness, persist won't trigger and the card won't return to the battlefield
Its no wonder its a staple in so many Commander decks
I'll let others calculate booster pack and booster box EVs and exclaim about what cards should have been included (*cough* Serum Visions *cough*) because I want to get right into investigating how the Limited environment is going to behave
Sebastian Rosenauer For me, this is the best artifact in the format, and its not even close
Other than that gimmick, this is a pretty okay option for a zombie-themed token deck, but the simple fact you can play his adventure-side from the graveyard gives Hildibrand a massive boost in my books