I've googled and gotten mixed answers. A lot of the discussions about it were back in 2011 though.
Level 32: MP Cost: 25, Number of Attacks: 3, Damage: 346%, DEF Ignore Chance: 31%, Additional Crit Rate: 52%, Instant Death Chance: 11%
Does this mean that there is a 31% chance of ignoring a monsters defense completely or that Blast has a built in 31% ignore on defense? If it is the latter doesn't that mean with only a 15% Ignore nebulite that I'd have over 100% monster defense ignore? 30% from Threaten, 30% from Leafre Set, 31% from Blast is already 91%.
My next question has to deal with Threaten. Does it actually stack with Demon Cry in KMS? I've seen the icon stack with Spikes Royale so I'm assuming those two skills stack for 52% Monster Ignore; however, when Demon Cry is used or Threaten is used while either is active the icon for one of them disappears.