its all illusionary though and doesn't actually inflict damage and as I said even if it hits once the effect will generally be weak and will require multiple hits unless he's able to maintain contact, which with his weak body would be hard to do. He can only take away one's painful memories and nothing more, not to mention the person has to do so willingly otherwise he can't do this. and he doesn't change his body into fluid, but coats his body in the fluid which gives a semi intangibliity that can be bypassed by weapons/armor or hard clothing. it can only bypass normal fabric and to open scars he has to touch the person's body, though if the target has little scars then this tech will barely do much damage.