オパールの宮殿
土地
：
を加える。
, ：あなたの統率者の固有色のうち好きな色１色のマナ１点を加える。あなたがあなたの統率者を唱えるためにこのマナを支払ったなら、その統率者は追加で、このゲームでそれが統率領域から唱えられた回数に等しい数の＋１/＋１カウンターが置かれた状態で戦場に出る。
イラスト：
Commander 2021#306コモン日本語適正
裁定
If you have two commanders, the last ability adds one mana of any color in their combined color identities.
If your commander is a card that has no colors in its color identity, Opal Palace’s last ability produces no mana. It doesn’t produce .
If you don’t have a commander, Opal Palace’s last ability produces no mana.
The “number of times it’s been cast from the command zone” includes the most recent time. For example, the first time you cast your commander from the command zone in a game, if you spent mana from Opal Palace’s last ability to do so, it will enter the battlefield with a +1/+1 counter.
If Opal Palace’s last ability produces two mana (most likely due to Mana Reflection) and you spend them to cast a commander, that commander enters with two counters for each time it’s been cast from the command zone this game.