“A staff with burning pitch. Grows dimmer each turn.” —In-game description, The Sacred Stones
The Torch (トーチ Tōchi) is an item that recurs across the Fire Emblem Series. This item is specifically designed for use in Fog of War-type battles, where it increases visibility by a set number of spaces, losing one space of visibility each turn. If a unit with already-extended visibility, such as a Thief, uses a Torch, the effect stacks, allowing for their field of vision to be further extended.
The Torch is an uncommon item, often appearing right before a Fog of War chapter begins. Its rarity is due to the fact that chapters with Fog of War are fairly uncommon or absent in many games, and are thus rarely needed.