When their bones are pulp, they can't do a darn thing.
Mash. Mash. Mash the zombies. Into fleshy pulp.
(To the tune of Row, Row, Row Your Boat)
Grab on to some of the necro energy, using the staff instead of my head, and turn some of the zombies against other zombies.
The mace/staff/whatever-this-thing-actually-is is surprisingly effective, given that it's a mace/staff/whatever-it-is. Probably due to the lasting glyphic effects, such as what effectively amounts to all of the staff's mass being, somehow, concentrated towards the whacking ends of the stick and the increase in broken bones. Also the staff has a heavy core to begin with.
The fighting style has a lot of Darth Maul type stuff, suggesting that should this particular object have more power, it would have more effects. It is still a strong weapon, and it may be getting somewhat stronger by sapping energy from the targets on contact.
Should it accumulate enough energy to do so, I unleash a Drain Magic spell through the staff.
Staves and Wands: Ways to safely channel more power, or power you're not comfortable letting anywhere near your brain, these magical objects are generally crafted by the person who uses said object and stuffed full of whatever things said magus can possibly include, although the vernacular uses the same word to refer to imbued objects ((spells-in-a-stick wands)), which do tend to take the same shapes.
Staves and wands work through a sympathetic process, where the wielder, having established a bond with the item in question, can implant spell structures and have the object itself draw upon local or distant mana sources without affecting the magus. Note, however, that the effects of any intentionally sabotaged energy might spread along the caster-staff link, albeit in a diluted form, should the caster have to actively link the source to the staff.
((I...May or may not be avoiding that last sentence.))