Coercion

Coercion (威圧 Iatsu) is a form of Caster Magic and a subspecies of Sound Magic related to manipulating the actions of others.

Description
By using their voice, the user is able to influence the decisions of others; he is able to make other people perform tasks that they wish by simply speaking them. Whilst using this magic the user's voice seems to become softer with an angelic quality. Whilst only demonstrated once, Gilderoy Marsh seems to exhibit enough control over it to manipulate several men at one time.