Slime Sickness

Slime Sickness is a side quest in Baldur's Gate: Siege of Dragonspear that can be found by going to the southernmost part of the Underground River, west of the Corrupted Druid Grove.
== Acquiring ==
By exploring the Underground River, will encounter a number of soldiers from the Shining Crusade who have been infected by some fungus that is dissolving them into jelly. They will plead for assistance, pointing them towards the mad druid Ferrusk whose corrupted grove lies just to the east.
== Walkthrough ==
If spoken to, Ferrusk will reveal he can cure the slime sickness, but he will require a Myconid Bloom-Sac and, depending on the chosen dialog options, no payment or payment in the form of either 2000 gold pieces or the murder of his former druidic cabal, who can be found just above the Underground River. Once presented with either the coins or the heads of Jamven and Chorster, he will take the Bloom-Sac from the party's inventory and give them the cure. Cooperating with him is not the only way to help these sick crusaders though, as he can also be attacked in order to retrieve the Slime Sickness Curative from his dead body. The curative should also be able to be pickpocketed from him.
Upon returning to the soldiers, all but one of them will be revived by the cure, rewarding the party with 6,000 EXP for completing the quest; one soldier succumbs to the slime sickness and instead transforms into a Mustard Jelly, which is worth 2,000 EXP when defeated. The leader of the sick soldiers will also reward with a Seal of Caelar.
Whilst this marks the official completion of the quest, the party can also speak to Ladle and inform him of having found and cured the sick crusaders, as the leader of the (formerly) sick soldiers suggests. He will express his gratitude for this:
* If the party responds with "Glad to be of service" or "has anything else fallen off the cart?", he will reward them with a Potion of Stone Giant Strength, an Oil of Speed, and a Potion of Absorption.
* If the party says "That's not good enough", he will give them a Potion of Stone Giant Strength and a Potion of Absorption.
=== Refuse to Help ===
If the player declares that they will not help the sick crusaders, they all instantly succumb to their disease and transform into a collection of Mustard Jellies, which immediately attack the party.
In newer game versions, it is no longer possible to refuse to help (confirmed for v. 2.6.6.0), the journal entry will always be the same, regardless of the chosen dialog options, and the crusaders will transform after a while.