Visions of Phyrexia — ruling 1

You must follow all normal timing rules for a card you play using Visions of Phyrexia's first ability and, if it's a spell, you must pay its costs to cast it.

Visions of Phyrexia — ruling 2

If you played a card from exile for any reason, the ability won't trigger, even if it wasn't the card you exiled with the first ability.

Visions of Phyrexia — ruling 3

If the card you exiled with the first ability is an instant, you may play it during your end step after Visions of Phyrexia's last ability has already resolved and created a Powerstone token. We call this having your cake and compleating it too.

Visions of Phyrexia — ruling 4

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."

Visions of Phyrexia — ruling 5

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.

Visions of Phyrexia — ruling 6

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.

Visions of Phyrexia : règles, fonctionnement et interactions (MTG)

Visions of Phyrexia 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

At the beginning of your upkeep, exile the top card of your library. You may play that card this turn. At the beginning of your end step, if you didn't play a card from exile this turn, create a tapped Powerstone token. (It's an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")

How it works : Visions of Phyrexia

Original English text — Wizards of the Coast / Scryfall

#1October 14, 2022· Wizards of the Coast
You must follow all normal timing rules for a card you play using Visions of Phyrexia's first ability and, if it's a spell, you must pay its costs to cast it.
No other card is named in this ruling.
#2October 14, 2022· Wizards of the Coast
If you played a card from exile for any reason, the ability won't trigger, even if it wasn't the card you exiled with the first ability.
No other card is named in this ruling.
#3October 14, 2022· Wizards of the Coast
If the card you exiled with the first ability is an instant, you may play it during your end step after Visions of Phyrexia's last ability has already resolved and created a Powerstone token. We call this having your cake and compleating it too.
Card named in this ruling
Powerstone
#4October 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
#5October 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
#6October 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