Ribcracker is a unique exceptional quarterstaff.
Ribcracker is unusual compared to most staves in that it is meant for physical use rather than skill bonuses; this is indicated by its unusually high damage and durability. With enhanced damage, an impressive chance of Crushing Blow, and increased Attack Speed, Ribcracker is a powerful weapon and often upgraded to a Stalagmite for more raw physical damage.
Still, despite its bonuses, compared to other exceptional or elite unique weapons Ribcracker may be overshadowed. The insane damage is physical attribute, so monsters with sufficient Physical resistance, like Uniques with Stone Skin, may be more troublesome.
It is a common misconception that Ribcracker is not useful because there is no such thing as a "Staff Mastery", but the Barbarian's Mace Mastery will work with any blunt weapons, including staves, scepters, and wands. It thus applies to Ribcracker. Ribcracker also offers a faster Hit Recovery as well as a great boost to Defense, effectively doubling it. When compounded with the effect of powerful armor and even an aura such as Defiance, defense can be boosted to more than effective levels, giving physical fighters a modicum of safety as long as there are no opposing spellcasters.
Ribcracker is good for any shifter Druid, as the bonuses and drawbacks are balanced by his form. A Barbarian specializing in Mace-type weaponry can also benefit from Ribcracker, as they do receive bonuses to use with staves from Mace Mastery, and having access to Natural Resistance can take the pain out of elemental attacks.
Two-Hand Damage: (54-62) to (143-169)
Required Level: 31
Required Strength: 25
Staff class - Normal Attack Speed
+200-300% Enhanced Damage
Adds 30-65 Damage
+50% Damage To Undead
50% Chance Of Crushing Blow
50% Increased Attack Speed
50% Faster Hit Recovery
+100% Enhanced Defense
+15 To Dexterity
Judging from the stats on the Ribcracker, one could surmise that it may have been a reference, if unintended, to the Monk from the Hellfire expansion for the original Diablo. He specialized in staff use, to the point of increased damage with staves, faster attack speed, and even able to protect himself better while wielding a staff, all of which are shown to some extent in the magical properties on this staff.