"Heaven" is a spoon developed to eliminate Trautman's grief, "it floats when the flow is fast" and "the silhouette becomes bigger if you want to explore deeper but heavier".
The thick and slender body sinks quickly, does not rise easily, can accurately search for the same depth, and can make the silhouette smaller than a conventional spoon.
Haven is useful in places where the flow is fast, where the water is deep, where the river is wide and long casts are required.
