Serum 208 is a permanent cure for the afflicted villagers of Mort'ton. It is used during the Shades of Mort'ton quest to turn Afflicted NPCs back into normal characters so the player can interact with them. It is made by using Serum 207 on the sacred flame at the rebuilt temple.
It is suggested it be used on Razmire Keelgan so he will always be coherent for the player and open his general and builder's stores. When used on an afflicted villager, they will turn into Mort'ton locals and reward the player with items like Olive oil, Tarromin, and Coins.
Although it is a "permanent" cure, the villagers will always return to their afflicted state, except for Razmire and Ulsquire Shauncy when talked to. Therefore, there is no way to permanently "clean up" Mort'ton.
Cure rewards
Curing the affliction of one of the Mort'ton villagers will cause them to give you one of the following items:
Item Quantity Rarity GE market price 
Coins 30–37 Common Not sold
Swamp paste 15–27 Common 1,065–1,917
Limestone brick 1–5 Common 181–905
Grimy tarromin 2–5 Common 314–785
Olive oil(1) 2–5 Common 52–130
Olive oil(2) 3–4 Common 72–96
Olive oil(3) 2–3 Uncommon 84–126
Olive oil(4) 1–3 Uncommon 15–45
Logs 2–4 Common 38–76
Oak logs 1–5 Uncommon 25–125
Willow logs 1–4 Uncommon 17–68
Maple logs 1 Rare 7
Bronze key crimson 1 Uncommon Not sold
Bronze key red 1 Rare Not sold
Bronze key brown 1 Rare Not sold
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