# 2017 Magic: The Gathering Aether Revolt #99

> Siege Modification, card number 99 from Magic: The Gathering's Aether Revolt set, designed to enhance Vehicle strategies with powerful enchantment effects.

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## Identity

- **Year**: 2017
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Aether Revolt
- **Card number**: #99
- **Product type**: TCG_CARD

## Description

Siege Modification, identified as card number 99 in the 2017 Aether Revolt expansion, is a distinct addition for Magic: The Gathering collectors and strategists. This Uncommon card, illustrated by Sung Choi, functions as an Enchantment — Aura that allows players to attach it to either a creature or a Vehicle. Its primary appeal lies in its versatility: while enchanting a Vehicle, it grants the permanent the additional type of creature, effectively bridging the gap between artifact and creature types. For collectors building out the AER set, this card represents a key mechanical piece that highlights the set's focus on industrial warfare and artifact synergy. The card's mana cost of {1}{R}{R} positions it as a mid-game option that provides a significant +3/+0 boost and first strike to the enchanted permanent. Whether you are completing your Aether Revolt collection or analyzing the design philosophy behind the release, Siege Modification offers a clear example of how enchantments can redefine battlefield dynamics.

## FAQ

### What type of card is Siege Modification in Magic: The Gathering?

Siege Modification is an Enchantment — Aura card from the Aether Revolt set. It can be attached to either a creature or a Vehicle permanent.

### How does Siege Modification affect a Vehicle?

When enchanted to a Vehicle, Siege Modification grants it the additional type of creature. Additionally, the enchanted Vehicle receives a +3/+0 power boost and gains the first strike ability.

### What is the rarity and card number for Siege Modification?

Siege Modification is an Uncommon card with the number 99 in the Aether Revolt set, released in 2017.

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Last verified: 2025-11-29.