Code of Constraint

Code of Constraint {2}{U}

Instant
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.
Details
Legalities
Rulings
  • 2019-01-25 Code of Constraint can target a creature that's already tapped. If you cast it during your main phase, that creature won't untap during its controller's next untap step.
  • 2019-01-25 If the target creature is an illegal target by the time Code of Constraint tries to resolve, the spell doesn't resolve. You don't draw a card.
  • 2024-01-12 Addendum abilities of instant spells apply while the spell is resolving, not immediately after casting it. If the spell is countered, you don't get the addendum bonus.
  • 2024-01-12 If an effect copies a spell with an addendum ability while it's on the stack, the copy wasn't cast at all, so you won't get the addendum bonus.
Links
Printings

Card is in preconstructed decks:

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Foreign names
  • 拘捕守则
  • 拘捕守則
  • Hemmende Formel
  • Code de contrainte
  • Codice di Costrizione
  • 制動規範
  • 통제 규약
  • Código de Restrição
  • Кодекс Ограничений
  • Código de represión