Quick Answer

Iron Mastiff is a uncommon Artifact Creature — Dog from CLB (CLB) costing {4}. Current price: $0.12 USD. Legal in Commander.

Iron Mastiff MTG card

Iron Mastiff

Artifact Creature — Dog

Card Text

Whenever this creature attacks, roll a d20 for each player being attacked and ignore all but the highest roll. 1—9 | This creature deals damage equal to its power to you. 10—19 | This creature deals damage equal to its power to defending player. 20 | This creature deals damage equal to its power to each opponent.

Card Stats

4/4 uncommon CMC: 4.0 CLB CLB 🎨 James Paick

What kind of card is this?

Use these role hubs to find similar staples, upgrades, and answers.

Roles are still being computed for this card.

Market Prices

TCGPlayer
$0.12
Normal
Buy
TCGPlayer
$0.35
Foil
Buy
Card Kingdom
$0.99
Normal
Buy
Card Kingdom
$0.79
Foil
Buy
Cardmarket
€0.19
Normal
Buy
Cardmarket
€0.26
Foil
Buy
Prices updated: 2025-12-16

Format Legality

Commander Legal
Duel Legal
Legacy Legal
Oathbreaker Legal
Vintage Legal

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Community Stats

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Frequently Asked Questions

What is Iron Mastiff? Basics

Iron Mastiff is a Artifact Creature — Dog card from the Magic: The Gathering trading card game.

Its ability reads: "Whenever this creature attacks, roll a d20 for each player being attacked and ignore all but the highest roll. 1—9 | This creature deals damage equal to its power to you. 10—19 | This creature deals damage equal to its power to defending player. 20 | This creature deals damage equal to its power to each opponent."

How much mana does Iron Mastiff cost to cast? Basics

Iron Mastiff has a mana cost of {4}, which equals 4.0 total mana (converted mana cost/mana value).

It is a colorless card and can be cast with any color of mana.

What does mana cost mean in Magic: The Gathering? Basics

Mana cost is the amount and type of mana required to cast a spell in Magic: The Gathering.

Iron Mastiff's mana cost of {4} means you need to pay that much mana from your lands or other sources.

Colored symbols (W=White, U=Blue, B=Black, R=Red, G=Green) must be paid with that specific color, while numbers can be paid with any color.

What is converted mana cost (CMC) or mana value? Basics

Converted mana cost (now officially called "mana value") is the total amount of mana in a card's mana cost, regardless of color.

Iron Mastiff has a mana value of 4.0. This is important for effects that care about a spell's total cost, like cascade or cards that say "mana value 3 or less."

What is oracle text? Basics

Oracle text is the official, current rules text for a Magic card as maintained by Wizards of the Coast. It supersedes any printed text on older cards.

Iron Mastiff's current oracle text is: "Whenever this creature attacks, roll a d20 for each player being attacked and ignore all but the highest roll. 1—9 | This creature deals damage equal to its power to you. 10—19 | This creature deals damage equal to its power to defending player. 20 | This creature deals damage equal to its power to each opponent."

What is the current price of Iron Mastiff? Pricing

The current market price for Iron Mastiff is approximately $0.12 USD on TCGPlayer.

A foil copy costs approximately $0.35 USD.

On Cardmarket (Europe), it's approximately €0.19 EUR.

Where can I buy Iron Mastiff? Pricing

You can purchase Iron Mastiff from major MTG retailers including:

Prices vary by condition and printing. Check multiple sellers to find the best price.

What is the difference between normal and foil cards? Pricing

Foil cards have a shiny, holographic finish that makes them more collectible. They are functionally identical to normal cards but typically cost more due to their rarity and visual appeal.

Iron Mastiff normal: $0.12 | foil: $0.35

Is Iron Mastiff legal in Standard? Legality

Format legality information for Iron Mastiff in Standard is not available.

Standard is a rotating format that only allows cards from the most recent sets.

Is Iron Mastiff legal in Modern? Legality

Format legality information for Iron Mastiff in Modern is not available.

Modern includes all cards printed in a standard-legal set from 8th Edition forward.

Is Iron Mastiff legal in Commander (EDH)? Legality

Iron Mastiff is Legal in Commander (EDH) format.

Commander is a casual multiplayer format where you build a 100-card singleton deck around a legendary creature.

Is Iron Mastiff legal in Pioneer? Legality

Format legality information for Iron Mastiff in Pioneer is not available.

Pioneer is a non-rotating format that includes all standard-legal sets from Return to Ravnica forward.

Is Iron Mastiff legal in Legacy? Legality

Iron Mastiff is Legal in Legacy format.

Legacy allows almost all cards ever printed, with a substantial ban list for balance.

Is Iron Mastiff legal in Vintage? Legality

Iron Mastiff is Legal in Vintage format.

Vintage is the most permissive format, allowing almost all cards with only a minimal ban list. Some powerful cards are "Restricted" (limited to 1 copy).

Is Iron Mastiff legal in Pauper? Legality

Format legality information for Iron Mastiff in Pauper is not available.

Pauper only allows cards that have been printed at common rarity in a paper or online set.

What is format legality in MTG? Legality

Format legality indicates which official MTG formats allow a card to be played:

  • Legal: Card is allowed in the format
  • Banned: Card is prohibited from play
  • Restricted: Limited to 1 copy (Vintage only)
  • Not Legal: Card was never part of that format's card pool

Different formats have different banned lists based on power level and game balance.

What set is Iron Mastiff from? Details

This printing of Iron Mastiff is from CLB (CLB), with collector number 317.

Iron Mastiff may also appear in other MTG sets with different art or special treatments.

What is Iron Mastiff's rarity? Details

Iron Mastiff is a uncommon card in CLB.

Card rarity affects both availability and price. From rarest to most common: Mythic Rare → Rare → Uncommon → Common.

Who illustrated Iron Mastiff? Details

Iron Mastiff was illustrated by James Paick.

Magic: The Gathering features artwork from hundreds of talented artists, and many cards have been reprinted with new art over the years.

What is Iron Mastiff's power and toughness? Details

Iron Mastiff is a 4/4 creature.

Power (4) determines how much combat damage the creature deals. Toughness (4) determines how much damage it can take before being destroyed.

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