# 2023 Magic: The Gathering Secret Lair Promo #10

> The 2023 Magic: The Gathering Secret Lair Promo card featuring Relentless Rats, a rare foil creature with a unique scaling power and toughness mechanic.

Canonical URL: https://supercatch.com/product/magic-the-gathering-secret-lair-promo-relentless-rats-10-foil-promo

## Identity

- **Year**: 2023
- **Brand**: Magic: The Gathering
- **Set**: Secret Lair Promo
- **Card Number**: 10
- **Featured**: Relentless Rats
- **Game**: Magic: The Gathering
- **Rarity**: Rare
- **Mana cost**: {1}{B}{B}
- **Type**: Creature — Rat
- **Power / Toughness**: 2 / 2
- **Color**: B
- **Language**: English
- **Material**: Card Stock
- **Finish**: Foil

## Description

Released in 2023 as part of the Secret Lair Promo set, this Magic: The Gathering trading card features the creature Relentless Rats. Identified as card number 10 with the set code SLP, the card is classified as a Rare foil print. The artwork for this release is credited to the artist GodMachine. As a black mana creature with a mana cost of {1}{B}{B}, it enters the battlefield with a base power and toughness of 2/2. The card's rules text distinguishes it from standard creatures in the game. It gains +1/+1 for each other creature on the battlefield named Relentless Rats, allowing it to grow significantly in size when multiple copies are present. Furthermore, the rules allow a deck to include any number of cards named Relentless Rats, rather than the usual limit of four. This flexibility makes it a unique structural element for players looking to build decks around swarm strategies. For collectors of Magic: The Gathering trading cards, this product represents a specific moment in the game's promotional history. The foil treatment adds a distinct visual layer to the card compared to non-foil versions. Completing sets or collecting specific artist works often drives interest in this release. The card serves as a tangible piece of the Secret Lair campaign, appealing to those who appreciate the game's creature types and mechanical variety. The combination of the Secret Lair branding and the specific card number makes it a recognizable entry for cataloging purposes.

## FAQ

### What is the mana cost of Relentless Rats?

The mana cost is {1}{B}{B}, requiring one generic mana and two black mana. This results in a mana value of 3.

### How does the Relentless Rats ability work?

The creature gets +1/+1 for each other creature named Relentless Rats on the battlefield. Additionally, a deck can contain any number of cards with this name, bypassing the usual four-card limit.

### Who is the artist for this Secret Lair Promo card?

The artwork for this 2023 Secret Lair Promo card was created by the artist GodMachine.

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Editorial content updated: 2026-10-09.

Site deployment: 2025-11-29.