The blackout's primary objective is successful: Kurapika uses the chaos to capture , the leader of the Spiders.
Hunter × Hunter 2011 Dub: Episode 57 "Initiative × And × Law" Hunter x Hunter 2011 (Dub) Episode 57
Phinks and Feitan argue that the Spider (the group) is more important than any individual limb, including the Head, and want to pursue the chain user regardless of the risk to Chrollo. including the Head
The abduction of their "Head" causes an immediate rift within the Troupe members: Hunter x Hunter 2011 (Dub) Episode 57