"In a daze, I woke and looked upon the battlefield, where I could swear my dreams were laying waste to the enemy."
—Letter from a soldier

「朦朧とする意識のなか、目が覚めて戦場を見ると、そこで私の夢が敵を蹴散らしている信じがたい光景が繰り広げられていた。」 ――ある兵士からの手紙

幻影の天使

飛行
幻影の天使は、このターンあなたが他の呪文を唱えていたときにのみ唱えられる。

「朦胧之中，我醒转过来，茫然地看着战场周遭的一切；我敢发誓是我的迷梦在对敌人大开杀戒。」 ～士兵的来信

虚幻天使

飞行
只能于你已施放过其他咒语的回合中施放虚幻天使。

Illusory Angel

Cast this spell only if you've cast another spell this turn.
Flying

Iconic Masters

Flying
Cast Illusory Angel only if you've cast another spell this turn.

"Yes, she is made of pure belief—but I hardly see why that makes her unique."
—Reith, master illusionist

Planechase Anthology

Magic 2015

Planechase 2012

It doesn't matter whether the other spell resolved. It could have been countered or, if you've somehow cast Illusory Angel as though it had flash, it could still be on the stack.