User blog comment:Felza/Map Strategy: The Twisted Treeline/@comment-5077844-20130513052713/@comment-4804165-20130513055941

Vilemaw buff gives Attack speed and CDR, both really useful in fights. It does not give movespeed.

Vilemaw Buff can actually turn games around, but note that it can easily be stalled out due to its really really short duration.