Arcadia Quest Whole Lotta Lava - $22

From the publisher:

Whole Lotta Lava includes a couple of brand new scenarios designed to plug into the Inferno campaign, utilizing Ignos, the Hellcats and the Fallen Angel! Through the course of an Inferno campaign, you'll simply be able to pick these scenarios instead of those from the Inferno campaign, and they will present you with all new challenges and opportunities, featuring new Quest cards, as well as new Reward Upgrades that you'll be able to bring into your campaign!