Monster Train 2: Destiny of the Railforged

Here is an excerpt from Monster Train 2: Destiny of the Railforged's description on Steam:

This exciting new expansion for Monster Train 2 adds a new clan, new artifacts and enemies, and a brand new game mode!

The Railforged Clan - Once, they built the rail and the train itself, now they have taken up their hammers to join the fight! Lead the clan as Herzal, the blacksmith that built the Rail and the Boneshaker. Or lead as Heph, the blacksmith behind the Skullcrusher and the Covenant Outpost!

With their extensive engineering knowledge, utilize their unique Forge mechanic to build up units and equipment. Deploy an army of newly built train stewards, turrets, machines, and assemble equipment and units during combat to add to your army and fend off the enemy!

Soul Savior - Introducing a new type of run! Free powerful Souls from the clutches of the Lifemother and her twisted children who have been trapped within the Soulstream for untold ages. Souls are upgrades that can be equipped to cards and have a huge array of effects. The Lifemother is an unstoppable force of nature so you will need to level up your Souls to gain enough power to take on the challenges found in the Soulstream.