Ash · Flame · Hearth · Iron · Spark · Tool

A Spark is ignition before it has a room. A Hearth is fire as a place that can be returned to. Flame is the visible reaction. Ash is what the reaction refuses to burn. Iron is the metal that remembers heat by changing how it holds. A Tool is matter given a job by a hand that needed the heat.

Forge is not a seventh object. It is tending and working recognized as one theme: combustion kept, metal changed, an extension left behind. Fire and Metal take the split. Heat is the conversation. Human is the hand. The map keeps the particular workshop, not a type called Craft.