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Rules guide · Artifact

Mox EmeraldHow it works & interactions with other cards

By the ManaCount desk· 2 min read· Vintage Masters· June 16, 2014
Carte Magic Mox Emerald

Mox Emerald 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.

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Official card text

{T}: Add {G}.

Complete guide

Mox Emerald is one of the legendary 'Power Nine' cards, providing an incredible advantage by accelerating your mana production for zero cost. As a zero-mana artifact that taps for green mana, it allows players to stay ahead of the curve from the very first turn. In digital formats, this iconic card is often conjured by specialized creatures, bringing ancient power to modern gameplay.

Unrivaled Mana Acceleration

Mox Emerald is a simple yet extremely powerful artifact. It costs zero mana to cast and has an activated ability that requires you to tap it to add one Green mana to your mana pool. Unlike lands, you can play this in addition to your land for the turn, effectively giving you access to two mana on your very first turn of the game.

How it Resolves Step by Step

1. You cast Mox Emerald from your hand (or it is conjured into your hand). Since its mana cost is {0}, you pay nothing. 2. Once the spell resolves, Mox Emerald enters the battlefield as an artifact. 3. As long as it is untapped, you can activate its mana ability at any time you have priority or are prompted to pay mana. 4. Tapping the artifact adds {G} immediately to your mana pool; this does not use the stack and cannot be responded to.

Common Mistakes

A common mistake is treating Mox Emerald as a land. While it provides mana, it is an artifact spell. This means it can be countered by spells that target noncreature spells, and it can be destroyed by effects that target artifacts. Additionally, while you are limited to playing one land per turn, you can cast as many Moxen as you have in your hand.

Strategic Timing

You should generally play Mox Emerald as soon as possible to maximize your mana advantage. In formats where Emerald Collector is present, timing your card draws to trigger the conjure ability is vital. Having a Mox Emerald in hand allows you to cast high-cost spells several turns earlier than your opponent expects.

Interaction examples

Fast Starts with Sol Ring

On turn one, you play a Forest, cast Mox Emerald, and then cast Sol Ring using the mana from the Forest. You can then tap Mox Emerald and Sol Ring to have three additional mana available, potentially casting a four-mana spell on your very first turn.

Conjuring Power with Emerald Collector

If you control Emerald Collector and draw your third card of the turn, the Collector's ability triggers and conjures a Mox Emerald directly into your hand. You can then immediately cast that Mox Emerald for free to increase your total available mana.

Drawing into Riches with Skullclamp

If you have already drawn one card for your turn, you can activate Skullclamp to sacrifice a creature and draw two more cards. This makes the cards drawn this turn total three, triggering Emerald Collector's ability to conjure a Mox Emerald into your hand for immediate use.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Mox Emerald

Original English text — Wizards of the Coast / Scryfall

No additional ruling has been published for this card.

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Popular combos

Real combos played by the community, sorted by popularity.

Cavalier of Dawn
+Infinite Reflection
+March of the Machines
+Mox Emerald
#1

Cavalier of Dawn + Infinite Reflection + March of the Machines + Mox Emerald

Infinite creature tokensInfinite death triggersInfinite creature ETBInfinite creature LTB
  1. 1Cast Mox Emerald by paying {0}.
  2. 2Mox Emerald enters the battlefield as a copy of Cavalier of Dawn.
  3. 3Copy of Cavalier of Dawn enter-the-battlefield ability triggers, destroying itself and creating you a 3/3 Golem token.
  4. 4Copy of Cavalier of Dawn dies, triggering itself, returning Mox Emerald from your graveyard to your hand.
  5. 5Repeat.
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Interactions with other cards

These cards' text mentions Mox Emerald.

Related cards and tokens

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Meta decks with Mox Emerald

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Official source