We may be able to help Iverron, as I know of an antidote that should help with the poison. It requires some ingredients, though, before I can make it.
I'll need Hyacinth mushrooms. You can find these growing under trees, or you may collect them from the grell south of here; they seem to have taken a liking to them. I'll also need Moonpetal lilies, which only grow around watery pools.
The last ingredient may prove the most difficult. From the very spiders that poisoned Iverron, collect Webwood ichor.
Rewards
No item rewards listed. Current Forever XP and money rewards are unknown.
Hyacinth Mushroom×7Classic reference required item
Moonpetal Lily×4Classic reference required item
Webwood IchorClassic reference required item