From DDO wiki
- On Hit: Applies a stack of Vulnerable (1% more damage for 3 seconds. This effect stacks up to 20 times, and loses one stack on expiration.). This effect may only occur on-hit once every two seconds.
- On Vorpal: Applies a stack of Lethargy (-1 to all Saving Throws. Non-bosses also move and attack 5% slower. This effect stacks up to 5 times.)