Mox Jasper 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
: Add one mana of any color. Activate only if you control a Dragon.
Complete guide
Mox Jasper is a zero-mana legendary artifact that provides fast mana acceleration for deck architectures built around Dragons. While it offers any color of mana, its power is balanced by a specific board state requirement.
Understanding the Dragon Requirement
Mox Jasper is a mana source with an activation restriction. You can only tap it for mana if you currently control at least one permanent with the Dragon creature type. If your Dragon leaves the battlefield in response to you attempting to activate this ability, you cannot activate it; however, once the ability is on the stack, it will resolve normally regardless of what happens to your Dragons.
Mana of Any Color
Unlike many artifacts that produce colorless mana, Mox Jasper can produce one mana of any of the five colors in Magic: white, blue, black, red, or green. Because it is a mana ability, it does not use the stack and cannot be responded to, provided you meet the Dragon requirement at the moment of activation.
Legendary Status
As a Legendary Artifact, the 'Legend Rule' applies to Mox Jasper. If you control two or more permanents named Mox Jasper, you must choose one to keep and put the rest into their owners' graveyards. This limits your ability to stack multiple copies for explosive early turns unless you have a way to bypass the rule.
When to Play Mox Jasper
This card is most effective in decks with low-cost Dragons or ways to generate Dragon tokens early. Since it costs zero mana to cast, it helps you accelerate your game plan immediately after your first Dragon hits the table, allowing you to cast additional spells in the same turn.
Interaction examples
Sol RingOn turn one, you play a land and cast Sol Ring. You then use the two colorless mana from Sol Ring to cast a low-cost Dragon. Because you now control a Dragon, you can play Mox Jasper and immediately tap it for a mana of any color to cast another one-mana spell.
SkullclampIf you have a 1/1 Dragon token on the battlefield, you can tap Mox Jasper for a mana of any color. You can then spend one generic mana to activate the equip ability of Skullclamp, targeting the Dragon. When the Dragon dies due to the -1 toughness, you draw two cards, having used the 'free' mana from the Mox to fuel the draw engine.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Mox Jasper
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
Popular combos
Real combos played by the community, sorted by popularity.
Rona, Herald of Invasion // Rona, Tolarian Obliterator + Mox Jasper + Retraction Helix
- 1Activate Mox Jasper by tapping it, adding
. - 2Cast Retraction Helix by paying , giving Rona an activated ability this turn.
- 3Activate Rona by tapping it, returning Mox Jasper from the battlefield to your hand.
- 4Cast Mox Jasper by paying
. - 5Rona triggers, untapping itself.
- 6Activate Mox Jasper by tapping it, adding one mana of any color.
- 7Repeat from step 3.
Rona, Herald of Invasion // Rona, Tolarian Obliterator + Mox Jasper + Banishing Knack
- 1Activate Mox Jasper by tapping it, adding .
- 2Cast Banishing Knack by paying , giving Rona an activated ability this turn.
- 3Activate Rona by tapping it, returning Mox Jasper from the battlefield to your hand.
- 4Cast Mox Jasper by paying .
- 5Rona triggers, untapping itself.
- 6Activate Mox Jasper by tapping it, adding one mana of any color.
- 7Repeat from step 3.
Legal formats
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Meta decks with Mox Jasper
No archived Top 8 deck with this card yet.