# 2020 Magic: The Gathering Core Set 2021 Promos #188s

> The foil rare promo version of Heroic Intervention from the 2020 Core Set 2021 Promos series, featuring a mana cost of {1}{G} and hexproof protection.

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## Identity

- **Year**: 2020
- **Brand**: Magic: The Gathering
- **Set**: Core Set 2021 Promos
- **Card Number**: 188s
- **Featured**: Heroic Intervention
- **Game**: Magic: The Gathering
- **Rarity**: Rare
- **Mana cost**: {1}{G}
- **Type**: Instant
- **Color**: G
- **Language**: English
- **Material**: Card Stock
- **Finish**: Foil

## Description

The Magic: The Gathering Core Set 2021 Promos series includes the rare foil Heroic Intervention card, designated as card number 188s. Released in 2020, this promotional instant spell carries a mana cost of {1}{G} and a mana value of 2. The card's effect grants hexproof and indestructible to all permanents you control until the end of the turn, providing a potent defensive response against targeted removal or combat damage. This utility makes it a functional piece for gameplay libraries, while the foil finish and promotional status add distinct appeal for collectors building specialized sets. Ajani Goldmane provides the flavor text, stating, "Whereever the strong would harm the weak, I will be there." This thematic element underscores the card's protective nature, aligning with the white-green color identity typical of Ajani's strategies. The card was illustrated by James Ryman, whose artwork complements the powerful defensive effect described in the rules text. As a promo variant, this card is not part of the standard Core Set 2021 checklist but is instead sought after by those interested in the promotional subset specifically. Collectors focusing on the Core Set 2021 Promos series may view this foil card as a key addition to their collection. The combination of a versatile game effect and the visual distinction of the foil treatment makes it a notable entry for enthusiasts of Magic: The Gathering trading cards. The Heroic Intervention 188s promo is a foil card from the 2020 Core Set 2021 Promos series.

## FAQ

### What is the mana cost of Heroic Intervention in Magic: The Gathering?

The Heroic Intervention card has a mana cost of {1}{G}, requiring one generic mana and one green mana to cast. It has a mana value of 2.

### What effect does the Heroic Intervention card have?

This instant spell gives hexproof and indestructible to all permanents you control until the end of the turn. This protects them from being targeted by opponents and prevents them from being destroyed.

### Who illustrated the Core Set 2021 Promos version of Heroic Intervention?

The foil promo version of Heroic Intervention from the 2020 Core Set 2021 Promos series was illustrated by James Ryman.

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Editorial content updated: 2026-10-05.

Site deployment: 2025-11-29.