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Dino Mermaid Island

The Enchanted CoastDungeon 1/10

Updated 4/19/2026, 5:58:03 AM

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Dino Mermaid Island cover

Dungeon NPCs

No dungeon NPCs yet.

Events

Event 1

The Mermaid's Plea at Driftwood Tavern Pier

The Driftwood Inn

Read Aloud

At the bustling Driftwood Tavern pier, the mermaid matriarch Lyria approaches you urgently. She explains that her precious sapphire pendant has been stolen and asks for your help to retrieve it from the Isle of the Ancients. As a token of gratitude, she gifts you a small boat pulled by two swift dolphins for a quick passage.

Details

Lyria emphasizes the pendant’s importance, hinting it holds ancient ocean magic key to countering Varathos’s corruption. The dolphins are intelligent and can assist in quick travel and minor underwater scouting. This event sets the party’s goal and provides transportation advantages for the journey ahead.

Event 2

Ambush by Raptor Raptors

Beach landing

Read Aloud

As you disembark and step onto the dense foliage of the Isle, sharp rustling sounds surround you. Suddenly, a pack of swift, raptor-like dinosaurs bursts from the undergrowth, screeching and baring razor-sharp teeth. They fiercely defend their nesting grounds, charging to attack! After the clash, you notice a glint among the leaves where the pack leader fell.

Details

This is a dynamic combat encounter involving multiple swift Allosaurus beasts. Their pack tactics and speed require strategic positioning and quick reactions from the party. The raptors are territorial and will retreat if their alpha is defeated or the party gains a clear upper hand. Once the raptors are defeated or driven off, the party can search the area to find a small leather pouch containing 50 gold coins and a mysterious silver amulet with oceanic runes, hinting at ties to the mermaids. This loot can be a valuable currency or a key to later secrets.

Event 3

Evading the Stegosaurus Blockade

Stegosaurus Nest

Read Aloud

Further into the jungle, you come face to face with towering stegosaurs blocking your path. Their massive plates gleam in the dappled sunlight as they graze, seemingly unaware of your presence. You must find a way to sneak past or distract these gentle giants to continue toward the ancient shrine.

Details

The stegosaurs are herbivores and not naturally aggressive but will defend themselves if threatened. Players can use stealth, nature knowledge, or clever distractions to bypass them. Failure to do so might provoke a dangerous confrontation or force a lengthy detour.

Event 4

The Shrine Guardian’s Fierce Defense

Dino Fort

Read Aloud

At the heart of the ancient jungle shrine, a massive carnivorous dinosaur roars, its eyes fixed on you as it fiercely guards the stolen sapphire pendant and arcane treasures. The beast lunges forward, ready to defend its hoard with deadly force. The air is thick with the scent of damp earth and ancient magic. Leaves rustle as the dinosaur shifts its massive weight, muscles tensing for attack.

Details

This final encounter pits the party against a powerful Tyrannosaurus Rex guarding the pendant. The beast’s strength and ferocity test the heroes’ combat abilities and teamwork. Successfully defeating or driving off the guardian allows the party to reclaim the sapphire pendant, a vital artifact for the campaign's progression. Alongside the pendant, the dinosaur’s lair contains several arcane relics and valuable treasure, including a small chest with gold coins and a mysterious enchanted amulet. The loot provides both immediate reward and potential plot hooks for future adventures.

DM Map Cards

DM Map Reference

The Driftwood Inn

Dungeon map

Print: one_grid_05

The Driftwood Inn
1

Marker Legend

1. The Mermaid's Plea at Driftwood Tavern Pier

Event marker

DM Map Reference

Beach landing

Dungeon map

Print: two_grid_075

Beach landing
1

Marker Legend

1. Ambush by Raptor Raptors

Event marker

DM Map Reference

Stegosaurus Nest

Dungeon map

Print: one_grid_05

Stegosaurus Nest
1

Marker Legend

1. Evading the Stegosaurus Blockade

Event marker

DM Map Reference

Dino Fort

Dungeon map

Print: four_grid_09

Dino Fort
1

Marker Legend

1. The Shrine Guardian’s Fierce Defense

Event marker

Monster Cards

Stegosaurus

Stegosaurus

Large Beast | Unaligned | L9

HP

81

AC

9

Speed

40 ft

Init

-1

STR 23 | DEX 9 | CON 21 | INT 2 | WIS 11 | CHA 5

Actions

Spiked Tail: Hit +6 | 1d10 + 6

Plate Bash: Hit -1 | 1d10 - 1

Magic

Defensive Plates: 1/day, Concentration. Raises armored plates to blunt incoming attacks. (1d10 + 5)

Tyrannosaurus Rex

Tyrannosaurus Rex

Huge Beast | Unaligned | L14

HP

105

AC

10

Speed

50 ft

Init

+0

STR 25 | DEX 10 | CON 19 | INT 2 | WIS 12 | CHA 9

Actions

Massive Bite: Hit +7 | 1d10 + 7

Tail Whip: Hit +0 | 1d10

Magic

Devour Bite: 1/day, Full Round. Crushing jaws deal huge damage and can restrain prey. (2d6 + 7)

Magic Item Cards

No image

Item Handout

Alchemical Herb Bundle

wondrous | common | L1

Value: 55 GP

The Shrine Guardian’s Fierce Defense

Description

Dried herbs used by healers and brewers.

Spells

No spells.

Chain Shirt +1

Item Handout

Chain Shirt +1

armor | uncommon | L1

Value: 185 GP

+1 AC when wearing this.

The Shrine Guardian’s Fierce Defense

Description

Light enchanted chain mail.

Spells

No spells.

Conclusion

Upon returning to Shorebreakton, the party is warmly welcomed back at the Driftwood Tavern, where they collect a well-earned reward of 300 gold pieces for their successful retrieval of Matriarch Lyria's sapphire pendant. This respite allows the adventurers time to rest, replenish supplies, and enjoy the town’s lively atmosphere, strengthening their bonds and preparing them for the challenges ahead.