its 80% proc to kinah box. i just crafted about 550x and got 440x kinah boxes.
the 10x craft to proc to +15 stigma is a joke, dont do it.
the 60x craft to +9/+12/+15 will almost gurantee a +9.
this is NOT an event, its just rubbish method to remove Ultimate Etium and Fighting Frags out of inventory.