严肃教诲 {2}{U}

瞬间

抓两张牌，然后弃一张牌。派出一个已横置的魔力石衍生物。（它是具有「{T}：加{C}。此法术力不能用来施放非神器咒语」的神器。）

「虽然两兄弟都聪颖过人，但他们争吵起来可整死我了。」
～托卡西雅的日志片段

DailyMTG Story Spotlight

Illustrated by Lie Setiawan

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The Brothers' War #64

Only the English version of a Magic card receives Oracle updates and errata. View this card in English. (Scryfall note)
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." (2022-10-14)
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. (2022-10-14)

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. (2022-10-14)