User blog comment:Miskos3/Fairy Tail Episode 246: Tartaros arc: Underworld King, Review/@comment-24546844-20150815140206/@comment-4933386-20150816065246

NoNickNeeded: I think what Saint is saying that Meredy's attack appears to be attacking one's nerve cells. the body feel the pain, but doesn't actually physically injure someone.

The sensory blades is kind of like a slight cut but due to its sensory nature... it boosts the senses around the affected area.

For example, two people; one with heightened senses to pain and one is normal. One tiny needle poking your thumb... the normal person would feel a quick sting pain but will recover relatively quick, but as for the one with heighten sense, it will feel like a bullet gone through your fingers.

the "damage" is the same, just one person feel the pain more.