User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-5043481-20130816160225/@comment-26074976-20130816161159

If you don't receive the 180 damage then it activates after so many minutes I think. I used my Zinogre armour today and I took maybe a lifepowder's worth of damage yet my arm lit up twice in 40 minutes.