---
name: "Code of Constraint"
mana_cost: "{2}{U}"
cmc: 3
type_line: "Instant"
colors: ["U"]
color_identity: ["U"]
keywords: ["Addendum"]
set: "PLST"
set_name: "The List"
collector_number: "RNA-35"
rarity: "uncommon"
artist: "Ekaterina Burmak"
oracle_id: "b2f83483-24a4-45db-a04e-42ff732ca98a"
canonical_url: "https://avascry.com/printing/code-of-constraint-plst"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "legal"
  pioneer: "legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# Code of Constraint
- **Mana Cost:** `{2}{U}` (CMC: 3)
- **Type:** Instant
- **Keywords:** Addendum

## Oracle Text
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.

## Top 4096-Dim Neural Synergies
1. [Crippling Chill](/printing/crippling-chill-j22.md) — Instant
2. [Befuddle](/printing/befuddle-m20.md) — Instant
3. [Constricting Tendrils](/printing/constricting-tendrils-con.md) — Instant
4. [Uncomfortable Chill](/printing/uncomfortable-chill-j25.md) — Instant
5. [Shocking Grasp](/printing/shocking-grasp-hbg.md) — Instant
6. [Fleeting Distraction](/printing/fleeting-distraction-avr.md) — Instant

## Printing Details
- **Set:** The List (PLST) #RNA-35
- **Rarity:** Uncommon
- **Artist:** Ekaterina Burmak
- **Total Printings:** 13 across all historical editions

## Format Legalities
Commander: `legal` | Standard: `not_legal` | Modern: `legal` | Pioneer: `legal` | Legacy: `legal` | Vintage: `legal` | Pauper: `not_legal` | Penny: `not_legal`