The Wielder of Mysteries is the Laboratory Maniac Jace Planeswalker
For those who are unfamiliar with Laboratory Maniac, he is a creature from Innistrad that allows you to win the game if there are no cards left in your library. The reason that this is so funny is because typically the strategy of a mill deck is to force your opponent to deck out. In most cases, decking out is a way to lose the game. But with Laboratory Maniac of this new Jace in play, you actually win the game instead.
Furthering his own goal are both of his loyalty abilities. His plus one ability is basically Thought Scour, which mills a player for two cards and draws you a card. His ultimate ability costs eight loyalty and draws seven cards. If you don't have seven cards left, you instead win the game. The ability has the added wording of winning the game since it's likely you will have to sacrifice Jace in order to use the ability. That would mean his ability would no longer be in play, so the extra wording guarantees you will still win the game anyway.
Also, Jace, Wielder of Memories is only a four mana Planeswalker that comes into play with four loyalty counters. That three of the four mana needed to cast him have to be blue does make him a bit tricky to cast on turn four. So, a deck that revolves around Jace, Wielder of Memories may need to be mono blue, at least in Standard, to be able to cast the key Planeswalker consistently.
A Persistent Petitioners Self-Mill Deck is Now Possible on Standard and Beyond
An already popular casual mill deck includes an interesting card called Persistent Petitioners from Ravnica Allegiance. This common on its own isn't incredibly powerful, but you can play as many copies as you want in a deck. He's a 1 / 3 Advisor for two mana (1U) with the ability to pay 1 colorless Mana and a tap to mill the top card of target player's library. The second ability is the more powerful. You can tap four untapped Advisors to mill 12 cards of target player's library. This is where the true power of this card comes into play.
Jace, Wielder of Memories makes a strategy revolving around the Petitioners a lot more viable. Players have already built Persistent Petitioners mill decks before, including a Commander version with Grand Arbiter Augustin IV as the Commander. Now, since, Jace Wielder of Memories and Persistent Petitioners share the same Standard format, the deck is now possible to build somewhat effectively in Standard.
Jace, Wielder of Memories in EDH / Commander
Pretty much any EDH deck that played Laboratory Maniac before or any sort of mill strategy will want to play Jace, Wielder of Memories. He's also just sort of generically good for his Thought Scour and draw 7 cards abilities. Jace, Memory Adept may still be the better Planeswalker for typical Mill decks, but you could easily play both. They just can't be in play at the same time.
Jace, Wielder of Memories in Modern Mill Decks
Like in EDH, Jace, Memory Adept is the premier mill card in Modern Mill decks. It's sort of a fringe deck strategy in the format, but Jace, Wielder of Memories certainly is a potential new include in some builds. Being that Wielder of Memories has a somewhat prohibitive triple blue cost doesn't matter quite as much in Modern even in a blue/black deck. It's possible he may be a one of in some builds, even mill decks that aren't meant to be self-mill, as an alternate win condition in games that go long.
Cards that serve as win conditions in and of themselves tend to be very good in Magic the Gathering. While not all “oops, I win” cards are particularly consistent, Jace, Wielder of Memories is good enough to be a useful cog in a control deck and the focal point of his own deck strategy. This Jace Planeswalker should be a lot of fun to play with, no doubt.
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