嵐の息吹のドラゴン
クリーチャー — ドラゴン
飛行、速攻、プロテクション（白）
：怪物化３を行う。（このクリーチャーが怪物的でない場合、これの上に＋１/＋１カウンターを３個置く。これは怪物的になる。）
嵐の息吹のドラゴンが怪物的になったとき、これは各対戦相手にそれぞれそのプレイヤーの手札にあるカードの総数に等しい点数のダメージを与える。
イラスト：
Theros#143神話レア日本語適正
裁定
For each opponent, count the number of cards in that player's hand when the last ability resolves to determine how much damage Stormbreath Dragon does to them.
Once a creature becomes monstrous, it can't become monstrous again. If the creature is already monstrous when the monstrosity ability resolves, nothing happens.
Monstrous isn't an ability that a creature has. It's just something true about that creature. If the creature stops being a creature or loses its abilities, it will continue to be monstrous.
An ability that triggers when a creature becomes monstrous won't trigger if that creature isn't on the battlefield when its monstrosity ability resolves.