Branch and Claw
The first Expansion for Spirit Island, Branch and Claw, features two new Spirits (Sharp Fangs Behind the Leaves and Keeper of the Forbidden Wilds) and a new Adversary (France (Plantation Colony)). In addition, it introduces Events to the Invader Phase of the game!
The Event Deck adds a new form of randomness to bring extra variety into the game. One Event Card is resolved per Invader Phase, each with both beneficial and detrimental effects for the Spirits. In addition, this expansion has Tokens that prevent the invaders from Exploring, Building, or Ravaging, and a token to represent the wild Beasts on the island. There's a new set of Powers that use these new tokens and expand the gameplay, new Fear cards, new Blight cards, and new Scenarios.