I just did that, but I'm still not getting any attack. Admittedly the first time I had neglected to give the impact a target. But now that I have, it's still not going. Since Troop Events isn't a specific option in RPG Maker XP, I assume you just started working with the individual event pages that each troop is given? Also, I'm unable to uncheck "set handling conditions" when subtracting the operand of 1 from the Countdown as that doesn't seem to be an option on this particular screen in XP. Is there any way you could post screenshots of your process or something so I could see what I'm missing?
EDIT:
Nevermind actually! I got it working! Thank you for your assistance!
EDIT 2:
Actually, another question. If this skill is given to an enemy, do you think it might work just as well? Or would there be some tweaks to make? If so, what are they?