Board Thread:Off Topic/@comment-25396609-20190908002326/@comment-44248215-20191027170535

Recently the idea of an optic-based Semblance is keep haunting in my mind.So I decided to write down it here

Name:Refraction

User:Raytheon Clausewitz(Named after "Light from God" in Greek)

Range:Around 15 meters

Type:Conjunction

Introduction:Manipulate refraction rate of space around user

Description:The user can change refraction rate of space around him.When user is imaging how light go through the area which he decided to use this Semblance in,refraction rate of that area will change to allow light to transmit like user's imagination.

Purpose:Utility

Visual cue:Space affected by this Semblance has glass-like texture and has false image

Tier 1:Form simple mirrors(via total reflection) and lenses for different purposes

Tier 2:Conjuate area optical illusions like mirage and complex optical instruments(lens and mirrors only) in a precise area

Tier 3:Provide optical stealth by reducing refraction rate below zero(Just like invisible cloak of Harry

Applications:The most common usage is conjuating optical instruments,like telescopes,eyeglasses and mirrors for various purposes.In battle,this Semblance is usually used as generating optical illusions(mirages,oppoent appearing at a false position,false trajectory of projectiles) to disrupt oppoents' decision.Raytheon can even temporarily blind his oppoents by focusing sunlight into oppoent's eyes.Optical stealth capability comes handy when he needs to cover him and his allies to escape or launch an ambush.

Limitations:Since Refraction affects all light that goes through a certain area,it may has negative effect on allies' visual sense if not used precisely.When using Refraction to provide stealth,no light can enter the affected area because all light just bypassed,which makes everyone inside literally blind if Raytheon doesn't leave holes for eyes.The larger its affected area is,the more aura it drains,so he can only conjuate a large area illusion for seconds to reserve aura.An intelligent oppoent can easily identify area optical illusion from misplaced vision.Bold text