Features

• Ceilings - Chambers are 15 feet high, and tunnels are 5 feet high
• Light - Unless otherwise specified, there is no natural light
• Water - Most of the Emerald Grotto is underwater

Locations

• E1: Grotto Entrance
  • Looks like a dead end DC 13 Perception check to notice tunnel dips below sea level
  • Takes 1 round to dive into water and traverse this room
• E2: Kelp Tangle
  • Group DC 13 Athletics check to swim through kelp
  • 1 round if group succeeds, 2 rounds if group fails
• E3: Cavern Fork
  • Maggie may block the party from taking the southern path if the rivals are in the lead
  • 2 rounds if they dawdle, 1 round otherwise

Eastern Path

• E4: Ghostgrass Patch
  • DC 12 Dexterity Saving throw or be restrained and take 1d6 necrotic damage (start of each turn)
  • DC 12 Athletics check to escape grass
  • DC 11 Nature or Survival check to harvest glowing algae from wall
  • At least 2 rounds + rounds it takes for characters stuck to get unstuck
• E5: Landslide
  • DC 14 Dexterity saving throw from landslide - 3d6 bludgeoning damage on fail (half on success)
  • Exits seem blocked by landslide. DC 10 Investigation check to find exit
    • If failed it just takes longer to find
    • If succeeds by 5 or more they also find hidden cave
  • Treasure in hidden cave
    • Potion of healing
    • Spell scroll of Thunderwave
  • At least 2 rounds + 2 rounds if failed investigation check + 1 round if hidden cave is searched
• E5: Quipper Den
  • Monsters
    • Swarm of Quippers
  • 1 round + rounds of combat

Southern Path

• E7: Octopus Garden

  • DC 17 Perception check to notice octopus
  • Monsters
    • Giant Octopus
  • Treasure at bottom of pit
    • 57 sp
    • Pouch with dust of dryness (already full of water)

• E8: Riptide Tunnel

  • DC 15 Athletics check to swim (fail means you stay put)
  • Tablet
    • Detect magic - shows evocation magic
    • AC 15 → 10 HP (immunity to poison and psychic damage)
    • When destroyed the current subsides
  • Rounds it takes to get across

• E9: Dead End?

  • DC 11 Perception check to find exit
  • DC 11 Survival check to feel current to exit
    • If failed it just takes longer to find
    • If succeeds by 5 or more they also find concealed cave
  • Treasure in concealed cave
    • 3 Potions of Healing
  • 1 round + 1 round to find exit (2 rounds if failed check) + 1 round if concealed cave is searched

• E10: Moonshark Lair

  • To remove spear/emerald
    • DC 13 Athletics check to pull spear from shark’s side
    • Cut rope AC 17 → HP 5
  • Race Results
    • 10 or fewer rounds - rivals don’t show up until after shark is dealt with
    • 11 - 15 rounds - rivals enter chamber on third round of combat
    • 16 or more rounds - rivals are already fighting the shark (it has 75 hp left)
  • Monsters
    • Giant Shark
      • While spear is attached:
        • the shark glows with silvery illumination, shedding bright light in a 10-foot radius and dim light for an additional 10 feet.
        • if the shark uses its action to make a bite attack and misses, it can use a bonus action to swim up to 25 feet without provoking opportunity attacks.
  • Treasure
    • Emerald Eye Amulet
    • Moon Touched Spear