Very good, actually. You have a chance to proc PER TARGET HIT. If you have the max number of targets for your AoE, then you have a decent probability of getting the proc to go off.
I'm not 100% sure if fissure hits the target once and then just continues applying knockdown, or if it makes a seprate roll for each critter within range every time it pulses... but if the later is the case, then the proc would be very good in this power.
Psi nado is a little different: the chance to proc can only occur when the tornado hits, and not with each tick of damage (because the Knock-up only happens upon the initial hit). So it's still good, but not as good as it might be in fissure.
-STEELE =)
Allied to all sides so that no matter what, I'll come out on top!
Oh, and Crimson demands you play this arc-> Twisted Knives (MA Arc #397769)
It's 100% win in fissure.
Any good in fissure or psychic tornado?