From Ultima Codex
Super Nintendo port of Ultima VII. It serves a similar function to the Wisp Whistle from the PC version of the game, allowing the Avatar to communicate with the Wisps.
The Avatar received the Magic Lantern from Trellek, after earning the emp's favor with a gift of honey. By shining its light into the wilds of Deep Forest during the night, the hero could attract a Wisp, and begin a conversation with it.