Yeap, pretty much all what Nathan stated previously.
But, it is quite expensive because you need to use soul ore each time you use it. Keep on mind that "it does not land 100% of the time" and it is a skill that use a lot of mp. At higher levels when you can enchant skills (lvl 76+) and you can enchant this skill for "chance" and it in that way increase the land rate. I've done research before and I think (not sure - need to review my notes) the land rate is around 60sh-70sh %. I went from 76-77 in WoA angels with this skill. My friend SE was with me all the time either recharging me or rooting the mobs that would fly away.
chance option is for the fear not for the lethal if u oe for attack u can oneshot it if lethal lands and even do small overhit saves u running to the mobs if lethal landed and fear too but then again its used from close range ^^;