The Hunter Master seems to know the poison well. Go and talk with them.
|Quests||The Suspicious Dagger (3) (69)|
|Map||East Siauliai Woods|
|NPC||[Hunter Master] Fiona Ieva|
Get Ridimed leaves at Ziuluti Vacant Lot in order to make the antidote. Press the 'Insert' key to enter Rest Mode and press the 'S' key to create the antidote.