The Code of Constraint card (RNA 35) from Magic: The Gathering's 2019 Ravnica Allegiance set. This Instant card features unique main-phase mechanics and is a staple for blue mana strategies.
Code of Constraint
2019 • Magic: The Gathering • Ravnica Allegiance
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Description
The Code of Constraint card, identified as number 35 in the 2019 Ravnica Allegiance expansion, is a distinct Instant card within the Magic: The Gathering trading card game. Designed by Ekaterina Burmak, this card represents a key component for players building blue-focused decks during this era of the game. Its design reflects the intricate world-building established in the Ravnica Allegiance set, offering collectors a tangible piece of that specific narrative chapter. Mechanically, the card provides a versatile tool for controlling the board state. It allows the caster to target a creature and reduce its power by four until the end of the turn, while also allowing the player to draw a card. This interaction is complemented by an Addendum ability that activates only if the spell is cast during a main phase. When triggered, this effect taps the targeted creature and prevents it from untapping during its controller's next untap step, creating a significant disruption for opponents. This dual-layered functionality makes the card a favorite among collectors who appreciate strategic depth in card design. For collectors, owning a copy of Code of Constraint from the Ravnica Allegiance set is an excellent way to expand a Magic: The Gathering collection. The card's mana cost of {2}{U} and mana value of 3 make it a recognizable element of the game's history. Whether you are focused on completing the set, investing in key cards from the Ravnica block, or simply admiring the artwork and mechanics of the 2019 release, this card holds a solid place in the TCG landscape. The Ravnica Allegiance set remains a significant release in Magic: The Gathering's timeline, and Code of Constraint stands out as a memorable card from that collection. Its ability to combine removal with card advantage, alongside its unique main-phase tap effect, illustrates the creative design philosophy of the era. Collectors often seek this card for its historical relevance and its continued utility in various formats. By adding this card to your collection, you are preserving a piece of the game's evolving story. ## Sources
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Card Details
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Catalog Profile
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Featured Subject
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Featured
Code of Constraint
Game
Magic: The Gathering
TCG Attributes
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Uncommon
Ekaterina Burmak
Card Stock
English
{2}{U}
Instant
U
Card Text
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Target creature gets -4/-0 until end of turn. Draw a card. Addendum — If you cast this spell during your main phase, tap that creature and it doesn't untap during its controller's next untap step.








