It sounds a bit like 540 for Wizard's, but will be for AS/DS, CS, TD, CMAN, etc. and will activate even on a successful attack giving you a reroll. Don't recall if it is a reroll with a bonus or just a reroll. can be applied to items in tiers "B0-B6"(or perhaps L for Luck) to increase the % rate of activation also something about it being applied to trinkets in place of or in addition to gear. So basically everyone will want a B6 wearable moldy bone.