# 2023 Magic: The Gathering Secret Lair Promo #4

> The 2023 Secret Lair Promo card Unholy Heat is a rare Magic: The Gathering instant featuring Delirium mechanics and artwork by Cabrol.

Canonical URL: https://supercatch.com/product/magic-the-gathering-secret-lair-promo-unholy-heat-4-promo

## Identity

- **Year**: 2023
- **Brand**: Magic: The Gathering
- **Set**: Secret Lair Promo
- **Card Number**: 4
- **Featured**: Unholy Heat
- **Game**: Magic: The Gathering
- **Rarity**: Rare
- **Mana cost**: {R}
- **Type**: Instant
- **Color**: R
- **Language**: English
- **Material**: Card Stock
- **Finish**: Normal

## Description

The 2023 Secret Lair Promo release features the Magic: The Gathering card Unholy Heat, identified by card number 4 in the SLP set. As a rare instant with a mana cost of {R}, this card offers strategic depth through its Delirium mechanic. If four or more card types are among cards in your graveyard, Unholy Heat deals 6 damage to a target creature or planeswalker instead of its standard 2 damage. Artwork by Cabrol brings this single-red mana spell to life within the distinctive Secret Lair Promo framework. The 2023 Secret Lair Promo card Unholy Heat is a Rare Instant with mana cost {R}. The Unholy Heat card stands as a notable entry in the 2023 Secret Lair Promo series, appealing to players who appreciate instant-speed interaction and graveyard-based synergies. The card deals 2 damage to target creature or planeswalker, or 6 damage if Delirium is active. For investors in collectible trading cards, the Secret Lair Promo subset has established itself as a desirable category within the Magic: The Gathering ecosystem. The Unholy Heat card, with its rare status and artist credit, represents a specific point of interest for those tracking the 2023 Secret Lair releases. Unholy Heat is card number 4 in the Secret Lair Promo set, illustrated by Cabrol. The SLP set code and card number 4 provide clear identification for cataloging purposes. Collectors can verify the authenticity and identity of this card through its specific set designation and year of release. The combination of Cabrol's artistic contribution and the card's mechanical design makes Unholy Heat a distinct piece within the broader Magic: The Gathering landscape. The marketplace connects collectors who value the specific attributes of cards from the 2023 Secret Lair Promo set.

## FAQ

### What is the mana cost of Unholy Heat in Magic: The Gathering?

Unholy Heat has a mana cost of {R}, meaning it requires one red mana to cast. It is classified as a rare instant card with a mana value of 1.

### How does the Delirium mechanic work on Unholy Heat?

Delirium allows Unholy Heat to deal 6 damage instead of 2 to a target creature or planeswalker if there are four or more card types among cards in your graveyard.

### Who created the artwork for the Unholy Heat Secret Lair Promo card?

The artwork for the Unholy Heat card in the 2023 Secret Lair Promo set was created by artist Cabrol. The card is identified by set code SLP and card number 4.

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Editorial content updated: 2026-10-10.

Site deployment: 2025-11-29.