Thunderstone: Heart of Doom brings the struggle introduced in Thunderstone to an epic climax. This expansion adds seven heroes, thirteen village cards, five monster groups, one treasure set, three settings, three guardians and one thunderstone.

No new rules or mechanisms are added in Thunderstone: Heart of Doom, but the many unique card abilities add and change typical deck-building strategies. Notable additions include cards that enable the obtaining of heroes and items while in the dungeon (including the Village Cutpurse, Gem Treasures and Highland Captain), monsters that add additional ranks to the dungeon (Dryads) and the Doppleganger monsters, which imitate villagers and mercenaries, with potentially deadly results!

Additionally, players can fight the final battle to seal the rift and save the world, with the "Rite of Banishing" setting that pits them against the incredibly powerful "Heart of Doom" guardian.

Publisher's description:

For years heroes have roamed the world searching for the legendary Thunderstones. Now, with seven in hand, the heroes must find the final stone of legend, to seal away the destructive entity known only as Doom. With the location of the eighth stone still unknown, he has begun to appear in the world. Time has run out, the heroes must face Doom on his terms!

Thunderstone: Heart of Doom brings to a climax the battle that has been building since the first release! Heart of Doom introduces seven new heroes, thirteen new village cards, and five new monster groups to challenge your deck-building skills!

Heart of Doom also features the battle with Doom, including a special scenario to bring war to the ultimate evil!

Set in the village of Artera, new dynamics and mechanisms ooze from every aspect of the game, in much the same way that a sinister evil oozes from the nearby swamp. The village and the corrosive nature of the surroundings mean that everything is not as it seems, even once trusted villagers may be your enemy; monsters bring new dimensions to the Dungeon, and the party is set up for field promotions and new ways of acquiring experience and equipment to fight their way to Doom.

It is a village and dungeon where the wary adventurer can easily fall prey to a bad decision, but the bold, brave and bright can find new ways to level up and fight evil at its Heart.

Will you survive to defeat Doom?