Thread:Kyledude788/@comment-27360363-20140821231717/@comment-5561174-20140821233111

Actually, you have to perform Royal Flush. When it hits, you then may pay the cost. That's all.

And about the skill performed. For ACT, you just perform it. But for AUTO, it goes like this. When a unit attacks, you have perform it. Same thing as "After the battle when this unit attacks a vanguard", "When one of your opponent's units retires", "When this unit drive checks", etc.