Theorist's Proxy is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
Flash When this creature enters, empower Jace 3. (Put three loyalty counters on a Jace token you control. If you don't control one, first create a blue Jace planeswalker token with "[−1]: Surveil 1" and "[−3]: Draw a card."), Sacrifice this creature: The next spell you cast this turn can't be countered.
Complete guide
Theorist's Proxy is a versatile blue Illusion that provides both immediate protection and long-term card advantage. With the power of Flash and the ability to manifest a Jace planeswalker token, it is a key piece for players who want to control the flow of the game.
What it Does
Theorist's Proxy has two main functions. First, when it enters the battlefield, it triggers 'empower Jace 3.' This either creates a Jace planeswalker token with three loyalty counters or adds three counters to one you already control. Second, you can pay one blue mana and sacrifice it to make your next spell uncounterable this turn.
How it Resolves Step by Step
When Theorist's Proxy enters, its triggered ability goes on the stack. Upon resolution, the game checks if you control a Jace planeswalker token. If you do not, you create one with zero loyalty first. Then, you place three loyalty counters on a Jace token you control. The activated ability is a separate action: you pay the mana and sacrifice the creature as a cost. This creates a continuous effect that applies to the very next spell you cast, preventing it from being countered by spells or abilities.
Common Mistakes
A frequent error is trying to put loyalty counters on a non-token Jace card, such as a legendary Jace card from your deck; 'empower Jace' only targets tokens. Additionally, if you control multiple Jace tokens, you must choose one to receive all the counters; you cannot split the three counters among different tokens. Finally, remember that the sacrifice ability must be activated before you cast the spell you want to protect.
When to Play it
Use its Flash keyword to deploy it at the end of your opponent's turn, setting up your Jace token to use its loyalty abilities on your own turn. If you are facing a deck with counterspells, save Theorist's Proxy to ensure your most important game-winning spell successfully resolves.
Interaction examples
Theorist's ProxyYou cast Theorist's Proxy while your board is empty. When it enters, you create a blue Jace planeswalker token. Because you didn't have one, it starts with 0 loyalty, but the 'empower 3' immediately adds 3 counters, leaving you with a Jace at 3 loyalty ready to use its [-1] or [-3] abilities.
Foundry InspectorYou have Theorist's Proxy on the battlefield and want to cast Foundry Inspector, but you fear your opponent has a counterspell. You pay {U} and sacrifice Theorist's Proxy. The next spell you cast, Foundry Inspector, now cannot be countered. Even if your opponent casts a spell to counter it, the Inspector will still enter the battlefield.
Ornithopter of ParadiseIn a game where you need your mana dork to survive, you can sacrifice Theorist's Proxy to protect Ornithopter of Paradise. By activating the Proxy's ability first, the Ornithopter is shielded from countermagic, ensuring you have the mana production you need for future turns.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Theorist's Proxy
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Some spells and abilities that empower Jace may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. You won't empower Jace.
Card named in this ruling
- #2· Wizards of the Coast
To empower Jace N, if you don't control a Jace planeswalker token, create a blue Jace planeswalker token with 0 loyalty, "[−1]: Surveil 1," and "[−3]: Draw a card." Choose a Jace planeswalker token you control. Put N loyalty counters on it.
Card named in this ruling
- #3· Wizards of the Coast
Empower Jace won't let you put loyalty counters on nontoken Jace planeswalkers. However, if you control a Jace planeswalker token that you got another way (such as an effect that creates a token that's a copy of a permanent), empower Jace will put loyalty counters on that.
Card named in this ruling
- #4· Wizards of the Coast
If you control a Jace planeswalker token, you can't choose to create a new one when you empower Jace. You have to put the loyalty counters on your existing Jace planeswalker token. In the rare case that you control multiple Jace planeswalker tokens, you'll choose one of those tokens to put the loyalty counters on.
Card named in this ruling
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Meta decks with Theorist's Proxy
No archived Top 8 deck with this card yet.