Duel for Cardia: Guardians of the Wild

From BoardGameGeek:

The conflict over Cardia has awakened mythical guardians! But each creature grants its power to only one of the factions. Can you use it to your advantage? Every second round, players encounter a guardian. If a card with the matching faction is played on the guardian, they trigger their ability and can thus massively change the encounter or encounters already played. This adds another exciting tactical component to the game.