Art: Svetlin Velinov

The Brothers' War · BRO #69 · Uncommon
Urza, Powerstone Prodigy
Legendary Creature — Human Artificer · 1/3
As a commander
Commander pageMarket price · TCGplayer
$0.17
▼ 10.53% · 7 days
$0.17
▼ 10.53% · 30 days
$0.17
▲ 13.33% · 90 days
$0.32
▲ 3.23% · 7 days
$0.32
▲ 0.00% · 30 days
$0.32
▲ 0.00% · 90 days
Official rulings
3
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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.
October 14, 2022
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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."
October 14, 2022
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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.
October 14, 2022