---
name: "Simic Keyrune"
mana_cost: "{3}"
cmc: 3
type_line: "Artifact"
colors: []
color_identity: ["G", "U"]
keywords: []
set: "GTC"
set_name: "Gatecrash"
collector_number: "237"
rarity: "uncommon"
artist: "Daniel Ljunggren"
oracle_id: "9e737a22-a352-411d-8412-96770c7f6cce"
canonical_url: "https://avascry.com/printing/simic-keyrune-gtc"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "legal"
  pioneer: "legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "legal"
---

# Simic Keyrune
- **Mana Cost:** `{3}` (CMC: 3)
- **Type:** Artifact

## Oracle Text
{T}: Add {G} or {U}.
{G}{U}: This artifact becomes a 2/3 green and blue Crab artifact creature with hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

## Top 4096-Dim Neural Synergies
1. [Scuttling Sentinel](/printing/scuttling-sentinel-clu.md) — Creature — Crab Elf
2. [Dimir Keyrune](/printing/dimir-keyrune-znc.md) — Artifact
3. [Golgari Keyrune](/printing/golgari-keyrune-rtr.md) — Artifact
4. [Giant Crab](/printing/giant-crab-tmp.md) — Creature — Crab
5. [Simic Charm](/printing/simic-charm-ea3.md) — Instant
6. [Skittering Crustacean](/printing/skittering-crustacean-pz2.md) — Creature — Crab

## Printing Details
- **Set:** Gatecrash (GTC) #237
- **Rarity:** Uncommon
- **Artist:** Daniel Ljunggren
- **Total Printings:** 18 across all historical editions

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