i really like Unicorn (something not real as well) and pan for panning gold. The gold pan might be the tool you were thinking about. Gold at the end of the rainbow thing...
Gold panning is a thing, and where e-holle lives there is a summer event every year linked to the gold rush of the Yukon. Edmonton was a huge hub for that. So pan has equity for both tool and Leprechaun.. I dont know much about Leprechauns, but I do think of the gold at the end of the rainbow..