Bulwark

From publisher description:

Heroic Co-operative Deck-Building!

Be a hero valiantly coming to the aid of a stronghold as a vast army bears down on it! Use the resources of the stronghold and your own unique abilities to keep it from overwhelmed.

Build a deck of cards to play with as you go and do your best to defeat the foes as they appear.

Choose one of 3 heroes - Arpad of Lhun, Zsuzsa Slatewalker and Sandor the Wise - to help a besieged settlement.

Face one of 2 pre-built armies, the Goblin Horde or the Fire Lizard Crusade, or customise your own.