Though I can't say for certain, I also believe this is a mistake dating back to beta 2 or 3, when the additional effect was a 20% chance to proc an AoE on the next use. Ah, the good ol' days, back when things were simple. When tomestomes but a twinkle in your father's eye... Ahem. Anyway, the text has been revised, and you can expect the fix to go live with 2.55! Thanks for the help!