You need a dagger for it to work, and it just adds poison damage and an AR bonus to your attack.
It's rarely used however, the only time you would invest any more points in this is as a synergy to Poison nova. For a *full* skelemancer you shouldn't have any points into the PnB tree except for maybe bone armor (which still is impratical) or just a single point in CE.
Additional Comment:
Also.. Poison/Skele hybrid sounds interesting. Have you ever made one of these, Blood?
It's rarely used however, the only time you would invest any more points in this is as a synergy to Poison nova. For a *full* skelemancer you shouldn't have any points into the PnB tree except for maybe bone armor (which still is impratical) or just a single point in CE.
Additional Comment:
Also.. Poison/Skele hybrid sounds interesting. Have you ever made one of these, Blood?