In "Garaitha’s Anvil," heroes undertake a daring strike mission for the Coalition that stands against the githyanki invasion. What appears at first to be a routine mission against a remote outpost reveals how close the githyanki are to completely overwhelming the Coalition's worldly defenses, but also exposes a critical weakness in the invaders' plans. By undertaking the dangerous infiltration of a githyanki planar nexus, the heroes have a chance to take the fight to the invaders on their own turf and to potentially turn the tide of war! "Garaitha’s Anvil" is an adventure for five 17th-level characters.