Assault the Vault!

For months, the merciless Ironfang Legion has
struck out against humanity from its impenetrable, otherworldly Onyx Citadel!
But now in possession of a key to this stronghold, the bold adventurers must
rally their allies, breach the barrier between worlds, tame an alien wilderness,
and finally bring the fight to their hobgoblin conquerors! Can the heroes best
the Legion's most devious commanders, including the unparalleled warrior-general
Azaersi, or will they fall as readily as their homeland before hobgoblin
blades?
This Pathfinder Adventure Path
volume concludes the
Ironfang Invasion
Adventure Path

and includes:

• "Vault of the Onyx Citadel," a
Pathfinder adventure for 16th-level characters, by Larry
Wilhelm.

• Suggestions for continuing the
campaign beyond the adventure's end, including a gazetteer of the Vault of the
Onyx Citadel, by Crystal Frasier.

• An ecology of the Vault Keepers and
the mythic Vault Builders, who together compose the xiomorn race, by Greg A.
Vaughan.

• Details on the powerful
xiomorn-crafted relics adventurers may find when exploring the Vault of the Onyx
Citadel, by Tim Hitchcock.

• A bestiary packed with elite Ironfang
Legion troops and denizens of the Plane of Earth, by Paris Crenshaw, Kalervo
Oikarinen, and Larry Wilhelm.