Board Thread:General Discussion/@comment-25814498-20150505201606/@comment-26328217-20170428142929

Name: Silence

Category: Specialization

Description: The user is capable of creating a sphere of varying size around themselves; anything outside this sphere cannot hear anything going on inside, and vice-versa. The user can also make their own actions completely silent.

Limitations: When using the sphere, the area of influence cannot be moved without deactivating the ability. Additionally, anyone and anything can enter or exit the sphere of influence unhindered, as it only blocks sound.

This is basically the power of Donquixote Rosinate from One Piece. Still, it would certainly be useful for assassins.