Q1: What does "while you have (the specified card) on the field" mean, exactly?
It refers to when you have the specified card in the battle area or breeding area.
Our Courage United ST20-14 C ADVENTURE While you have a Digimon or Tamer with the [ADVENTURE] trait on the field, you can ignore this card's color requirements. [Main] <Draw 2>. (Draw 2 cards from your deck.) Then, place this card in the battle area. [All Turns] When any of your level 5 or higher Digimon would leave the battle area, <Delay> (By trashing this card after the placing turn, activate the effect.) • You may play 1 level 5 or lower Digimon card with the [ADVENTURE] trait from your hand without paying the cost. --- [Security] Place this card in the battle area.
Our Courage United ST20-14 C ADVENTURE While you have a Digimon or Tamer with the [ADVENTURE] trait on the field, you can ignore this card's color requirements. [Main] <Draw 2>. (Draw 2 cards from your deck.) Then, place this card in the battle area. [All Turns] When any of your level 5 or higher Digimon would leave the battle area, <Delay> (By trashing this card after the placing turn, activate the effect.) • You may play 1 level 5 or lower Digimon card with the [ADVENTURE] trait from your hand without paying the cost. --- [Security] Place this card in the battle area.
Our Courage United ST20-14 C ADVENTURE While you have a Digimon or Tamer with the [ADVENTURE] trait on the field, you can ignore this card's color requirements. [Main] <Draw 2>. Then, place this card in the battle area. [All Turns] When any of your level 5 or higher Digimon would leave the battle area, <Delay> • You may play 1 level 5 or lower Digimon card with the [ADVENTURE] trait from your hand without paying the cost. ---
勇気をひとつに ST20-14 C アドベンチャー エリアに特徴に「アドベンチャー」を持つ自分のデジモン/テイマーがいる間、このカードは色条件を無視できる。 【メイン】≪2ドロー≫(自分のデッキからカードを2枚引く)。その後、このカードをバトルエリアに置く。 【お互いのターン】Lv.5以上の自分のデジモンがバトルエリアを離れるとき、≪ディレイ≫(置いた次のターン以降にこのカードを破棄することで、効果を発揮する)。 • 自分の手札から、特徴に「アドベンチャー」を持つLv.5以下のデジモンカード1枚をコストを支払わずに登場できる。 --- 【セキュリティ】このカードをバトルエリアに置く。