High Command is the deck-building game from Privateer Press (though with how it plays, it’s more like Living Card Game to me, but we can discuss that in the comments if you’d like). See what the experts at Play Board Games thinks about it in their latest review.
From the review:
Warmachine: High Command is a deck-building game set in the Iron Kingdoms. You battle over locations to score VPs. Can you build a better army than your opponents?