Spirit Island: Jagged Earth includes:

• 3 New Scenarios
• 10 New Spirits - including 41 Unique Power Cards
• 2 New Adversaries - including 4 Adversary Reminder Tiles
• 2 New Island Boards
• 30 New Event Cards
• 6 New Fear Cards
• 7 New Blight Cards
• 24 New Major Power Cards - including 1 Sea Monster replacement card
• 33 New Minor Power Cards
• 6 Aspect Cards - Optional aspects (innate powers) for the 4 core game spirits
• 25 Badland Tokens - A new way to fight invaders!
• More plastic, wooden, and cardboard tokens play up to 6 players)
  • 18 Dahan
  • 24 Blight
  • 25 Explorers
  • 16 Towns
  • 10 Cities
  • 35 Beast Tokens
  • 30 Disease Tokens
  • 22 Wilds Tokens
  • 22 Strife Tokens
  • 16 Fear Markers
  • 24 Energy Markers
    • 18 1-Energy Markers
    • 6 3-Energy Markers
  • 26 Spirit Presence - 13 each in 2 colors
  • 6 Single-Turn Effect Markers (Defend) - 3 of each in 2 colors
  • 18 Single-Turn Effect Markers (Isolate) - 3 of each in 6 colors
  • 64 Element Markers - 8 of each element
• 6 Player Aid Cards
• 8 Reminder Cards
• New play options: combining adversaries, playing with an Archipelago (split island), and more.

— original description from the publisher, revised with released contents