A Slow Poison is a side quest in that gives more insight into how The Butcher sees the people of Treviso. It also gives a hint or two on the mystery surrounding the Antaam invasion. The Antivan Crows, known for their espionage and intelligence gathering, suspect a traitor within the city walls, aiding the Antaam in their swift takeover. The player character, alongside their companions, is tasked by the Crows to uncover the truth.
Companions make no real difference in this overall, except for Lucanis, a romanceable companion. Lucanis has the spells that the boss of this quest is weak to. This will make a semi-unfair fight a lot easier, so make sure to take Lucanis. The quest involves surprisingly few fights, and since the only difficult fight takes place in a tight room with a high-damage boss, bringing a lot of health items is also a good idea. Make sure to follow your quest markers during this quest because it's a lot of running.
A Slow Poison quest in becomes available after you rescue Lucanis during the story quest, Sea of Blood. Once you've completed that quest, head back to Treviso and visit the Antivan Crows' hideout in the city's Central district. Speak to Teia and Viago, the Crows' leaders, and they will tell you about a missing scout, Dareth, who was tasked with investigating a potential traitor in Treviso's walls. They'll ask for your help in finding Dareth and finding out the truth behind the city's swift fall to the Antaam invaders.
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It doesn't really matter what you say to the Crow leaders; you'll end up doing the quest anyway. You're going to need to follow the quest marker to the Drowned District, located on the south side of Treviso.Use the ziplines for a fast way to get through, but the quest marker will eventually take you toa warehouse by the water where you'll meet Jacobus, Dareth's cousin. Jacob is being held
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