Childermass will give the glaive a curious look but he won't step back or otherwise move because of it. Sure, that looks intimidating, but he really doubts Lavellan plans on stabbing him with it, so--

"I ask about people, what they're up to, where they are," he answers, gaze flicking away from her Spark-turned-scythe and back to her. "What may come to pass, what is happening at present. While the cards are not always clear nor do they always have an answer, they are certainly a part of getting me to where I am."