Secrets Beneath the Mountains (Penny Blood Adventures) Hardcover – February 12, 2026

The anvil is set. This is the forge around it.Secrets Beneath the Mountains is the official expansion companion for War of the Dwarves, published by Penny Blood Adventures. It is not a second campaign — it is a vault of tools, lore, mechanics, monsters, relics, dungeons, and endgame content designed to deepen every session of the core adventure or extend it into something larger.War of the Dwarves tells a complete story on its own. This book exists for the GM who wants more.More history — a full, table-ready chronicle of Durharthal, the Frozen Crown of the North, from its founding on veins of god-touched Froststeel through the catastrophic Shattered Pact that buried its throne in ice. More theology — the Primordial and New God pantheons brought to life through cults, heresies, festivals, omens, and divine favor systems that make faith a mechanical force at the table. More factions — clan histories, internal politics, and breaking points for every major dwarven house in the campaign.More player options — including the Emberborn lineage for characters shaped by divine fire, the Forge-Keeper and Oath of the Deep Anvil subclasses, and the Chainbreaker's Boon system that lets players earn divine rewards by challenging the gods' authority rather than submitting to it.More mechanics — runic magic and glyph systems, divine chaincrafting using god-metals, sky-travel runes, and a divine retribution framework that gives the Old Gods real mechanical teeth when the party disrespects their domains.More monsters — forge-born and magma creatures, ironwrought constructs, windborne horrors, and chainbound nightmares, each designed with clear thematic roles so you can drop them into existing encounters or build new ones around them.More magic items — legendary dwarven relics and cursed steel, defensive Stoneward armor, and the Crown of Shards spotlight relic with its own arc and consequences.More dungeons — deep forge delves, shattered anvil sites, echo mines where sound has memory, citadels guarded by stone itself, and a complete Nine Vaults generator that lets you spin up custom dwarven vaults on demand whenever your table wants another delve.And for groups who reach the finale and want to keep going — saga-level endgame content including The Last Binding, The Forge Eternal, and an ascension path where player characters can reshape the divine order itself. These are intentionally heavy modules designed to extend the campaign into a full saga.Every module is tagged by impact level so you know exactly what you're adding. Light modules — a monster, a relic, a festival — drop in without changing anything. Medium modules — clan lore, divine favor, recurring cults — add depth across multiple sessions. Heavy modules — myth-tier arcs, chaincrafting systems, endgame sagas — can reshape the entire trajectory of your campaign. Start light, add as your table demands, and never use more than your story can carry.The book also includes Runic Echoes — dwarven work-songs, war-chants, dirges, and binding rites that function as soft magic at the table. When your players rally miners with a battle cry and NPCs start chanting it back in later sessions, the world remembers. Words become tools. Tools become weapons. And sometimes weapons grow teeth.Secrets Beneath the Mountains hands you the forge and trusts you to strike the hammer where it matters. Read more