---
name: "X, Mystery Racer"
mana_cost: "{3}{U}{B}"
cmc: 5
type_line: "Legendary Creature — Human Spy"
colors: ["B", "U"]
color_identity: ["B", "U"]
keywords: []
set: "UNK"
set_name: "Unknown Event"
collector_number: "RZ05i"
rarity: "rare"
artist: ""
oracle_id: "a097ca92-c032-481c-8447-582c4ad50d02"
canonical_url: "https://avascry.com/printing/x-mystery-racer-unk"
legalities:
  commander: "not_legal"
  standard: "not_legal"
  modern: "not_legal"
  pioneer: "not_legal"
  legacy: "not_legal"
  vintage: "not_legal"
  pauper: "not_legal"
  penny: "not_legal"
---

# X, Mystery Racer
- **Mana Cost:** `{3}{U}{B}` (CMC: 5)
- **Type:** Legendary Creature — Human Spy
- **Power/Toughness:** 5/5

## Oracle Text
When X enters, you may put it into target opponent's hand. If you do, as long as it remains in their hand, that player can't cast X and they play with their hand revealed.
During your turn while X is in an opponent's hand, you may activate abilities of nonland permanents opponents control. If you activate the crew or saddle ability of a permanent this way, gain control of it until end of turn. Untap it. It gains haste until end of turn.

## Top 4096-Dim Neural Synergies
1. [X](/printing/x-ulst.md) — Legendary Creature — Human Spy
2. [Defective Detective](/printing/defective-detective-ust.md) — Creature — Human Spy
3. [Sly Spy](/printing/sly-spy-ust.md) — Creature — Human Spy
4. [Telepathic Spies](/printing/telepathic-spies-7ed.md) — Creature — Human Wizard
5. [Stromgald Spy](/printing/stromgald-spy-all.md) — Creature — Human Rogue
6. [Xantcha, Sleeper Agent](/printing/xantcha-sleeper-agent-slc.md) — Legendary Creature — Phyrexian Minion

## Printing Details
- **Set:** Unknown Event (UNK) #RZ05i
- **Rarity:** Rare
- **Artist:** 

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