インスタント — 罠
このターン、いずれかの対戦相手が3枚以上のカードを引いていた場合、あなたはルーン炎の罠のマナ・コストを支払うのではなく、

を支払ってもよい。
プレイヤー1人を対象とする。ルーン炎の罠はそのプレイヤーに、そのプレイヤーの手札のカードの枚数に等しい点数のダメージを与える。
Effects that increase or reduce the cost to cast a Trap will apply to whichever cost you chose to pay.
You may ignore a Trap's alternative cost condition and simply cast it for its normal mana cost. This is true even if its alternative cost condition has been met.
Casting a Trap by paying its alternative cost doesn't change its mana cost or mana value. The only difference is the cost you actually pay.
The player you target with Runeflare Trap doesn't have to be the opponent that drew three or more cards this turn.