Harbingers in Harbinger Mode can speak, but cannot perceive others clearly, so they would be one way conversations.

A Harbinger might be more likely to speak to a landmark or environmental phenomenon.

A Harbinger who creates a storm might wish to, say, harvest the glass from its lightning strikes; or to water the local plant life, or to drive out invasive species - their goals are long-term, focused on significant changes to environmental and ecological conditions.