The Well's Unknown Abyss

The Well's Unknown Abyss is an extension technique of the Ten Shadows Technique that combines the Nue and Toad shikigami.

Description
By creating the shadows of both Nue and the Toad, Megumi can combine them together to create winged toads to aid him in battle. These toads can fly with increased mobility, as well as use their tongues to restrain opponents. Unlike its parent shikigami, these toads are relatively weaker but can be destroyed without consequence and can be summoned as long as Nue and the Toad are alive.

Megumi first used this technique to fight against Aoi Todo.