Auto battlers are a genre where you build your "deck" and the computer plays against other players. An example autobattler is Hearthstone Battlegrounds.
You could call it a card game since the "deck" is a set of units, which are effectively the same as cards in games like Magic or Hearthstone. On the other hand it kind of pushes the boundary, since as Wikipedia puts it auto battlers are also a "strategy video game".
Are questions on auto battlers on topic?