---
name: "Chromium, the Mutable"
mana_cost: "{4}{W}{U}{B}"
cmc: 7
type_line: "Legendary Creature — Elder Dragon"
colors: ["B", "U", "W"]
color_identity: ["B", "U", "W"]
keywords: ["Flying", "Flash"]
set: "M19"
set_name: "Core Set 2019"
collector_number: "214"
rarity: "mythic"
artist: "Chase Stone"
oracle_id: "58d8ff36-4a4d-40e0-b812-3d23b2c7606a"
canonical_url: "https://avascry.com/printing/chromium-the-mutable-m19"
legalities:
  commander: "legal"
  standard: "not_legal"
  modern: "legal"
  pioneer: "legal"
  legacy: "legal"
  vintage: "legal"
  pauper: "not_legal"
  penny: "legal"
---

# Chromium, the Mutable
- **Mana Cost:** `{4}{W}{U}{B}` (CMC: 7)
- **Type:** Legendary Creature — Elder Dragon
- **Power/Toughness:** 7/7
- **Keywords:** Flying, Flash

## Oracle Text
Flash
This spell can't be countered.
Flying
Discard a card: Until end of turn, Chromium becomes a Human with base power and toughness 1/1, loses all abilities, and gains hexproof. It can't be blocked this turn.

## Top 4096-Dim Neural Synergies
1. [Chromium](/printing/chromium-me3.md) — Legendary Creature — Elder Dragon
2. [Surrak Dragonclaw](/printing/surrak-dragonclaw-ktk.md) — Legendary Creature — Human Warrior
3. [Fluxcharger](/printing/fluxcharger-dgm.md) — Creature — Weird
4. [Transcendent Dragon](/printing/transcendent-dragon-tdc.md) — Creature — Dragon
5. [Thryx, the Sudden Storm](/printing/thryx-the-sudden-storm-thb.md) — Legendary Creature — Elemental Giant
6. [Chrome Prowler](/printing/chrome-prowler-j25.md) — Artifact Creature — Phyrexian Cat

## Printing Details
- **Set:** Core Set 2019 (M19) #214
- **Rarity:** Mythic
- **Artist:** Chase Stone
- **Total Printings:** 12 across all historical editions

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