Slagstone Refinery — ruling 1

If Slagstone Refinery is put into a graveyard from the battlefield or exiled from the battlefield at the same time that one or more other nontoken artifacts controlled by the same player are put into a graveyard from the battlefield and/or exiled from the battlefield, its triggered ability will trigger once for each of them plus once for itself.

Slagstone Refinery — ruling 2

Powerstone tokens are a kind of predefined token. Each one has the artifact subtype "Powerstone" and the ability "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell."

Slagstone Refinery — ruling 3

You can use the {C} added by a Powerstone token on anything that isn't a nonartifact spell. This includes paying costs to activate abilities of both artifact and nonartifact permanents, paying ward costs, and so on.

Slagstone Refinery — ruling 4

Although all the cards in The Brothers' War that create Powerstone tokens create a tapped Powerstone token, entering the battlefield tapped isn't part of the token's definition. Notably, if you create a token that is a copy of a Powerstone token, the token copy won't enter the battlefield tapped.

Slagstone Refinery : règles, fonctionnement et interactions (MTG)

Slagstone Refinery is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Whenever this artifact or another nontoken artifact you control is put into a graveyard from the battlefield or is put into exile from the battlefield, create a tapped Powerstone token. (It's an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")

Complete guide

Slagstone Refinery is a powerful engine for artifact-based decks, ensuring that your losses on the battlefield translate into future resources. By generating Powerstone tokens whenever your nontoken artifacts are destroyed or exiled, it helps you ramp into massive threats. This card provides excellent insurance against removal while fueling your high-cost artifact spells.

Converting Scrap to Power

The core mechanic of Slagstone Refinery is a triggered ability that watches for nontoken artifacts leaving the battlefield for the graveyard or exile. Unlike many 'death' triggers, this includes exile effects, ensuring you get value even if your opponent uses spells like Swords to Plowshares. Every time a qualifying artifact is removed, you create a Powerstone token that enters the battlefield tapped.

Resolution and Timing

When a nontoken artifact you control moves from the battlefield to the graveyard or exile, the ability triggers and goes on the stack. Once it resolves, you place a Powerstone token onto the battlefield tapped. If multiple artifacts are destroyed at once—for example, by a board wipe—Slagstone Refinery sees all of them, including itself, and triggers separately for each one.

Spending Powerstone Mana

The mana produced by these tokens has a specific restriction: it cannot be used to cast nonartifact spells. However, it is very flexible beyond that. You can use it to cast any artifact spell, or to pay for any activated ability, whether that ability is on an artifact, a creature, or a land. It can even be used to pay for costs like Ward or taxing effects from your opponents.

Interaction examples

Double Value from Death

Solemn Simulacrum

When Solemn Simulacrum dies, two triggers occur. First, the Golem's own ability triggers, allowing you to draw a card. Simultaneously, Slagstone Refinery triggers because a nontoken artifact was put into the graveyard. You end the exchange with a new card in hand and a tapped Powerstone on the field.

Cycling for Resources

Commander's Sphere

If you activate the second ability of Commander's Sphere, sacrificing it to draw a card, Slagstone Refinery sees it move to the graveyard. After you draw your card, the Refinery's trigger resolves, giving you a Powerstone. This effectively turns the sacrifice into a ritual that draws a card and ramps your mana for future turns.

Surviving the Wipe

If an opponent casts a spell that destroys all artifacts while you control Slagstone Refinery and three other nontoken artifacts, the Refinery triggers for the other three artifacts AND itself as they all leave the battlefield simultaneously. You will create four tapped Powerstone tokens, allowing you to rebuild immediately on your next turn.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Slagstone Refinery

Original English text — Wizards of the Coast / Scryfall

#1October 14, 2022· Wizards of the Coast
If Slagstone Refinery is put into a graveyard from the battlefield or exiled from the battlefield at the same time that one or more other nontoken artifacts controlled by the same player are put into a graveyard from the battlefield and/or exiled from the battlefield, its triggered ability will trigger once for each of them plus once for itself.
No other card is named in this ruling.
#2October 14, 2022· Wizards of the Coast
Powerstone tokens are a kind of predefined token. Each one has the artifact subtype "Powerstone" and the ability ": Add . This mana can't be spent to cast a nonartifact spell."
Card named in this ruling
Powerstone
#3October 14, 2022· Wizards of the Coast
You can use the added by a Powerstone token on anything that isn't a nonartifact spell. This includes paying costs to activate abilities of both artifact and nonartifact permanents, paying ward costs, and so on.
Card named in this ruling
Powerstone
#4October 14, 2022· Wizards of the Coast
Although all the cards in The Brothers' War that create Powerstone tokens create a tapped Powerstone token, entering the battlefield tapped isn't part of the token's definition. Notably, if you create a token that is a copy of a Powerstone token, the token copy won't enter the battlefield tapped.
Card named in this ruling
Powerstone