# 2017 Magic: The Gathering Unstable #140

> This 2017 Unstable foil card (#140) features the Border Guardian, an Uncommon Artifact Creature-Knight with dynamic abilities triggered by spell border colors.

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## Identity

- **Year**: 2017
- **Manufacturer brand**: Magic: The Gathering
- **Set / series**: Unstable
- **Card number**: #140
- **Product type**: TCG_CARD

## Description

The 2017 Unstable expansion brought a distinct silver-bordered identity to Magic: The Gathering, and the Border Guardian card (#140) stands as a prime example of its playful mechanics. This foil version of the card is an Uncommon Artifact Creature — Knight that offers interactive gameplay based on spell border colors. When you cast a silver-bordered spell, the creature receives a +1/+1 counter, increasing its power and toughness. Casting a black-bordered spell allows it to bypass blocking restrictions for that turn, while a white-bordered spell grants it double strike until the end of the turn.

Collectors often seek out this release to complete their Unstable sets or to appreciate the creative design direction of the era. The card's versatility makes it a favorite for casual formats and home games where silver-bordered rules apply. Its foil treatment adds visual appeal, making it a desirable addition to any Magic: The Gathering collection. Whether you are building a themed deck or simply expanding your library, this card represents a fun and strategic piece of MTG history.

## FAQ

### What type of card is Border Guardian in Magic: The Gathering?

Border Guardian is an Artifact Creature — Knight from the 2017 Unstable set. It has a mana cost of four and a power and toughness of 1/1, with unique abilities that activate when you cast spells with different border colors.

### How does the Border Guardian's ability work?

The creature's abilities trigger based on the border color of the spells you cast. Silver-bordered spells give it +1/+1, black-bordered spells let it go unblocked, and white-bordered spells grant it double strike.

### Is the Unstable set silver-bordered?

Yes, the Unstable expansion is a silver-bordered set, meaning it follows alternate rules and mechanics distinct from the standard Magic: The Gathering format.

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Last verified: 2025-11-29.