# 2022 Magic: The Gathering The Brothers' War Promos #203s

> This 2022 Magic: The Gathering promo card features Rootwire Amalgam, a mythic rare Artifact Creature — Golem with Prototype mechanics and foil finish.

Canonical URL: https://supercatch.com/product/magic-the-gathering-the-brothers-war-promos-rootwire-amalgam-203s-foil-promo-mythic-rare

## Identity

- **Year**: 2022
- **Brand**: Magic: The Gathering
- **Set**: The Brothers' War Promos
- **Card Number**: 203s
- **Featured**: Rootwire Amalgam
- **Game**: Magic: The Gathering
- **Rarity**: Mythic Rare
- **Mana cost**: {5}
- **Type**: Artifact Creature — Golem
- **Power / Toughness**: 5 / 5
- **Language**: English
- **Material**: Card Stock
- **Finish**: Foil

## Description

The Rootwire Amalgam 203s foil promo from Magic: The Gathering's 2022 The Brothers' War Promos set is a mythic rare Artifact Creature — Golem with a Prototype mechanic. This card allows players to cast it with a {1}{G} cost for a 2/3 body or a {5} cost for a 5/5 body, maintaining its abilities and types across both forms. The card’s unique ability lets you sacrifice it to create an X/X colorless Golem artifact creature token, where X is three times its power, gaining haste until end of turn. This activation can only be done as a sorcery.

Leon Tukker illustrated this foil Mythic Rare promo card from the 2022 The Brothers' War Promos set, identified by card number 203s. The Prototype feature adds strategic depth, allowing players to adapt their mana investment based on the game state. The foil finish enhances the card's premium feel, making it a desirable addition to any Magic: The Gathering collection.

Rootwire Amalgam 203s is not just a collectible item but also a functional piece in the Magic: The Gathering universe. Its versatile casting options and powerful token creation ability make it a sought-after card for both competitive play and collection purposes. The card's mythic rare status and promo nature further elevate its appeal among Magic: The Gathering enthusiasts.

Rootwire Amalgam is a 5/5 Artifact Creature — Golem with mana cost {5} from the 2022 The Brothers' War Promos set. The card features the Prototype mechanic, allowing you to cast it with a different mana cost, color, and size while keeping its abilities. You may activate its sorcery-speed ability to sacrifice Rootwire Amalgam and create an X/X colorless Golem artifact creature token, where X is three times its power.

## FAQ

### What is the Prototype mechanic on Rootwire Amalgam?

Prototype allows you to cast Rootwire Amalgam with either a {1}{G} mana cost for a 2/3 body or a {5} mana cost for a 5/5 body, while keeping its abilities and types the same in both forms.

### How does Rootwire Amalgam's sacrifice ability work?

You can sacrifice Rootwire Amalgam as a sorcery to create an X/X colorless Golem artifact creature token with haste, where X is three times the creature's power when it sacrificed.

### What set and rarity is Rootwire Amalgam 203s from?

Rootwire Amalgam 203s is from the 2022 The Brothers' War Promos set (PBRO) and is classified as a mythic rare promo card with a foil finish.

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Editorial content updated: 2026-10-05.

Site deployment: 2025-11-29.