# 2022 Magic: The Gathering Innistrad: Double Feature #73

> The foil version of Secrets of the Key from Magic: The Gathering's 2022 Innistrad: Double Feature set. This #73 common instant card features a distinctive reflective finish.

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## Identity

- **Year**: 2022
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Innistrad: Double Feature
- **Card number**: #73
- **Product type**: TCG_CARD

## Description

Secrets of the Key is a one-mana blue instant card from the 2022 Innistrad: Double Feature expansion for Magic: The Gathering. Carrying the number 73 in the DBL set code, this common card is distinguished by its foil treatment, which adds a shimmering quality to the card's surface. Designed by Alix Branwyn, the card serves as a functional piece for decks seeking early mana acceleration or card advantage through its unique mechanics.

The card’s rules text allows players to Investigate, creating a Clue token that can be sacrificed for a card draw. A notable feature is its ability to Investigate twice if cast from a graveyard, offering strategic flexibility. It also includes a flashback cost of three generic mana and one blue mana, enabling players to reuse the spell from their discard pile. This versatility makes it a staple in blue-based strategies that rely on tempo and resource management.

For collectors, the foil finish of Secrets of the Key stands out among the common cards of the Innistrad: Double Feature set. While the card itself is a common rarity, the foil variant appeals to enthusiasts who appreciate the visual distinction it brings to their collection or deck boxes. The Innistrad: Double Feature set, released in 2022, combines two popular Innistrad blocks, making cards from this release highly relevant to fans of the plane's gothic horror aesthetic. Owning a foil copy of Secrets of the Key allows collectors to highlight a functional card with a premium finish, enhancing its display value. Whether used in gameplay or kept as a collectible piece, this card represents a solid addition to any Magic: The Gathering enthusiast's inventory. The combination of its useful gameplay effects and the eye-catching foil treatment makes it a noteworthy item for those who value both utility and presentation in their trading card game collections.

## FAQ

### What does the Investigate mechanic do?

Investigate creates a Clue token, which is an artifact that can be sacrificed for two mana to draw a card. If Secrets of the Key is cast from a graveyard, it creates two Clue tokens instead of one.

### What is the flashback cost for Secrets of the Key?

The flashback cost for Secrets of the Key is three generic mana and one blue mana ({3}{U}). This allows the card to be cast from the graveyard after it has been discarded or used.

### Who illustrated the Secrets of the Key card?

The Secrets of the Key card from the Innistrad: Double Feature set was illustrated by Alix Branwyn. Her artwork contributes to the gothic horror theme characteristic of the Innistrad plane in Magic: The Gathering.

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Last verified: 2025-11-29.