"Few ways, depending on the spirit involved." He reaches for his wine glass, tips what's left into his mouth, then looks back at her.

"If it's noncorporeal, draw it out, use the sign of Yrden to trap it. Coat my silver sword in specter oil for the fight. If it's possessed somebody..."

Well. Good thing he's got Reinald's philter with him now. "Makes it harder, but not impossible."