Wrath senses his reaction to the news- the anxiety. He does not shy away from the answer to the question, because it's the truth, and he has no reason to hide it. The Undead are no friends of their group. They cannot be reasoned with from what he could tell - not that Wrath intends to do any reasoning.

"I intend to put an end to her once and for all, which also requires knowing and putting an end to The Beastmaster if the Merchant is to be believed." And Wrath does not entirely believe him and certainly does not trust him, but he has reason to want the Undead destroyed as well.

There's another pause, because he hopes it is clear what he is after from that alone. However, he'll elaborate.

"I could tell the mention of the Beastmaster had... an effect on you. If you have more information on him, I would like to know it."