# 2017 Magic: The Gathering Aether Revolt Promos #49s

> Whir of Invention is a Rare foil Instant card from the Aether Revolt Promos set, identified by set code PAER and card number 49s. The card has a mana cost of {X}{U}{U}{U}, a mana value of 3, and is colored U with a color identity of U. It features a normal layout and artwork by Christine Choi.

Canonical URL: https://supercatch.com/product/magic-the-gathering-aether-revolt-promos-whir-of-invention-49s-foil-promo

## Identity

- **Year**: 2017
- **Brand**: Magic: The Gathering
- **Set**: Aether Revolt Promos
- **Card Number**: 49s
- **Featured**: Whir of Invention
- **Game**: Magic: The Gathering
- **Rarity**: Rare
- **Mana cost**: {X}{U}{U}{U}
- **Type**: Instant
- **Color**: U
- **Language**: English
- **Material**: Card Stock
- **Finish**: Foil

## Description

Whir of Invention is a Magic: The Gathering trading card game card. It is a Rare foil Instant from the Aether Revolt Promos set (PAER). The card number is 49s. It has a mana cost of {X}{U}{U}{U}, a mana value of 3, and is colored U. The color identity is U. The layout is normal. The artist is Christine Choi. It is a promo card.

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Editorial content updated: 2026-10-11.

Site deployment: 2025-11-29.