僧院の速槍
クリーチャー — 人間・モンク
速攻
果敢（あなたがクリーチャーでない呪文を唱えるたび、ターン終了時まで、このクリーチャーは＋１/＋１の修整を受ける。）
「動く気配なし。我々が先手を打てそう――」 ――マルドゥの略奪者、ガイザ
イラスト：
Double Masters 2022#362コモン日本語適正
裁定
Any spell you cast that doesn't have the type creature will cause prowess to trigger. If a spell has multiple types, and one of those types is creature (such as an artifact creature), casting it won't cause prowess to trigger. Playing a land also won't cause prowess to trigger.
Prowess goes on the stack on top of the spell that caused it to trigger. It will resolve before that spell.
Once it triggers, prowess isn't connected to the spell that caused it to trigger. If that spell is countered, prowess will still resolve.
An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.