The Well's Unknown Abyss

The Well's Unknown Abyss (不知井底) is a Ten Shadows Technique used by Megumi Fushiguro that combines his Nue and Toad familiars.

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.

Megumi first used this technique to fight against Aoi Todo.