Maligaro's Spike
Maligaro's SpikeMaligaro loved his tools, and took great pains to keep them excruciatingly sharp.
Maligaro's Spike is a quest item acquired after defeating the Weaver within the Weaver's Chambers during the quest, "Sharp and Cruel".
In conjunction with the 
Baleful GemBaleful GemThe withering glare of corruption, made
corporeal and pellucid in crystal.
, Maligaro's Spike is required to gain access to the Vaal Ruins Level 1 during the quest, "The Root of the Problem".