The Strangeman's Shell is a harvestable that can be found in the Frontier. It can be found from various sources and locations throughout the Frontier including but not limited to:
- A possible reward from a Treasure Chest.
- A possible reward from the Firefly Quest.
- A possible reward from an Otherworld Present.
- A possible reward from the Otherworld Tower.
- A rare drop from a Shellmouth.
- A rare drop from a Primeval Genie.
- Being harvested from Coral Bay, Matumada, Pebble Bay, The Far Coast, and The Long Coast.
The Strangeman's Shell is a shell composed of a gray clam with a green creature living inside of it. A glowing purplish-white pearl can be seen above the eye and a small pile of sand can be seen under the collectible. Players can exchange 2 Strangeman's Shells for 90,000 during the Slayer's Tasks. If the player has no purpose for the Strangeman's Shell, it can be sold for 11,111 gold.