騒乱の落とし子
クリーチャー — デーモン
絢爛
（このターンに対戦相手がライフを失っていたなら、あなたはこの呪文を、これのマナ・コストではなく絢爛コストで唱えてもよい。）
飛行、トランプル
あなたのアップキープの開始時に、騒乱の落とし子は各プレイヤーにそれぞれ１点のダメージを与える。その後、あなたのライフが10点以下であるなら、騒乱の落とし子の上に＋１/＋１カウンターを１個置く。
イラスト：
Ravnica Allegiance#85神話レア日本語適正
裁定
If each player has 0 life after Spawn of Mayhem’s triggered ability resolves, each player loses the game at the same time and the game ends in a draw.
If Spawn of Mayhem gains lifelink, the damage it deals will cause you to simultaneously lose and gain life. If your life total is 1, you won’t lose the game.
In a Two-Headed Giant game, Spawn of Mayhem’s last ability causes each team to lose 2 life. Then if your team’s life total is 10 or less, you put a +1/+1 counter on Spawn of Mayhem.
Damage dealt to a player causes that player to lose that much life.
Spectacle doesn’t change when you can cast the card. For example, you can’t cast a sorcery with spectacle during an opponent’s turn unless another effect allows you to do so, even if that player has lost life this turn.
To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying (such as a spectacle cost), add any cost increases, then apply any cost reductions. The converted mana cost of the spell remains unchanged, no matter what the total cost to cast it was.
A card’s spectacle cost is the same no matter how much life your opponents lost or how many opponents lost life.
In a multiplayer game, if an opponent loses life and later that turn leaves the game, you can cast a spell for its spectacle cost. (If a player leaves the game during their turn, that turn continues without an active player.)