Arbalest Engineers 弩械工程师
When this creature enters, choose one —
• This creature deals 1 damage to any target.
• Put a +1/+1 counter on target creature. It gains trample and haste until end of turn.
• Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
当弩械工程师进战场时，选择一项～
•弩械工程师对任意一个目标造成1点伤害。
•在目标生物上放置一个+1/+1指示物。它获得践踏与敏捷异能直到回合结束。
•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。）
当此生物进场时，选择一项～
•此生物对任意一个目标造成1点伤害。
•在目标生物上放置一个+1/+1指示物。它获得践踏与敏捷异能直到回合结束。
•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。）
Paratranz
单卡释疑
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(2022-10-14 official)
只要是非神器咒语以外的东西，你就可以用魔力石衍生物产生的这份{无}来支付。这包括支付用于起动神器或非神器永久物之异能的费用，支付守护费用，等等。
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 official)
魔力石衍生物是一种预定义衍生物。每个此类衍生物都具有「魔力石」此神器类别，且具有异能「{横置}：加{无}。此法术力不能用来施放非神器咒语。」
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 MTGZH)
虽然兄弟之战系列中所有能派出魔力石衍生物的牌，派出的都是已横置的魔力石衍生物，但「横置进战场」并不属于该衍生物预定义内容的一部分。特别一提，如果你派出一个为魔力石衍生物复制品的衍生物，则该衍生物不会是横置进战场。
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.