# 2016 Magic: The Gathering Oath of the Gatewatch Promos #166s

> The Stoneforge Masterwork is a rare foil promo artifact from the 2016 Oath of the Gatewatch Promos set, offering equipment with versatile creature type synergy.

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## Identity

- **Year**: 2016
- **Brand**: Magic: The Gathering
- **Set**: Oath of the Gatewatch Promos
- **Card Number**: 166s
- **Featured**: Stoneforge Masterwork
- **Game**: Magic: The Gathering
- **Rarity**: Rare
- **Mana cost**: {1}
- **Type**: Artifact — Equipment
- **Language**: English
- **Material**: Card Stock
- **Finish**: Foil

## Description

The Stoneforge Masterwork card, identified by number 166s, is a rare foil promo from the 2016 Magic: The Gathering Oath of the Gatewatch Promos set. Designed by Ben Maier, this artifact equipment carries a mana cost of {1} and provides a distinct mechanical advantage to players who build around shared creature types. The card's rules text allows the equipped creature to gain +1/+1 for each other creature you control that shares a creature type, creating a scalable power boost that grows with your board state. The equip cost is {2}, making it accessible for early-game deployment. Collectors value this piece for its specific design within the Oath of the Gatewatch promotional releases. The foil finish gives the card a premium aesthetic that appeals to those who prioritize finish quality in their Magic: The Gathering trading card game collections. The flavor text references the nomadic kor and the impact of the Eldrazi, grounding the card in the narrative context of the Oath of the Gatewatch era without requiring deep lore knowledge to appreciate. Stoneforge Masterwork is a 2016 foil promo from the Oath of the Gatewatch Promos set, featuring a mana cost of {1}. As an Equipment artifact, it gives equipped creatures +1/+1 for each other creature you control that shares a creature type with it. Understanding the specific mechanics of cards like Stoneforge Masterwork helps collectors appreciate the depth of design in Magic: The Gathering. The interplay between equipment bonuses and creature type matching creates a unique gameplay experience that distinguishes this card from standard artifacts. The card is numbered 166s in the set and was illustrated by Ben Maier.

## FAQ

### What is the mana cost of Stoneforge Masterwork?

The Stoneforge Masterwork has a mana cost of {1} and a mana value of 1. This low cost allows it to be played easily in the early turns of a Magic: The Gathering game.

### How does the Stoneforge Masterwork equipment ability work?

The equipped creature gets +1/+1 for each other creature you control that shares a creature type with it. The equip ability costs {2} generic mana.

### What set is the 166s Stoneforge Masterwork from?

The Stoneforge Masterwork (166s) is part of the Oath of the Gatewatch Promos set, released in 2016. It is a rare foil promo card illustrated by Ben Maier.

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Editorial content updated: 2026-10-01.

Site deployment: 2025-11-29.