---
name: "Ominous Lockbox"
mana_cost: "{1}{U}"
cmc: 2
type_line: "Artifact — Clue"
colors: ["U"]
color_identity: ["U"]
keywords: []
set: "YMKM"
set_name: "Alchemy: Murders at Karlov Manor"
collector_number: "8"
rarity: "rare"
artist: "Nicholas Gregory"
oracle_id: "f9247a6e-2e2d-4125-986b-e03714601e1c"
canonical_url: "https://avascry.com/printing/ominous-lockbox-ymkm"
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"
---

# Ominous Lockbox
- **Mana Cost:** `{1}{U}` (CMC: 2)
- **Type:** Artifact — Clue

## Oracle Text
As Ominous Lockbox enters, secretly choose a number between 1 and 20.
When an opponent casts a spell with mana value equal to the chosen number, sacrifice Ominous Lockbox. If you do, copy that spell, and you may choose new targets for the copy.
{2}, Sacrifice Ominous Lockbox: Draw a card.

## Top 4096-Dim Neural Synergies
1. [Diviner's Lockbox](/printing/diviners-lockbox-m20.md) — Artifact
2. [Vexing Bauble](/printing/vexing-bauble-mh3.md) — Artifact
3. [Wisedrafter's Will](/printing/wisedrafters-will-mb2.md) — Enchantment
4. [You Find the Villains' Lair](/printing/you-find-the-villains-lair-afr.md) — Instant
5. [Esoteric Duplicator](/printing/esoteric-duplicator-big.md) — Artifact — Clue
6. [Wizard's Spellbook](/printing/wizards-spellbook-pafr.md) — Artifact — Book

## Printing Details
- **Set:** Alchemy: Murders at Karlov Manor (YMKM) #8
- **Rarity:** Rare
- **Artist:** Nicholas Gregory

## 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`