Hellscream's Warsong

Hellscream's Warsong is zone-wide raid buff granted to all Horde players in Icecrown Citadel which increases health, healing done and damage done. The first level of Hellscream's Warsong was activated on March 2, 2010 - 1 month after The Lich King became available.

It was released at 5%, but increased in power over time.