Degenerate

Deviant or Degenerate is a unique skill originally owned by Shizue Izawa. After consuming her, Rimuru obtained this skill as well.

Effects
The effects of Deviant can be broadly divided into two categories:
 * Synthesize/Unification: Transform two differing targets into a single object.
 * Separate/Separation: Release the properties inherent to the target and make it into a separate object. (The original object may disappear if it has no physical form).

Trivia

 * The kanji for Deviant translates to both Shapeshifter and Deviant (Degenerate or Pervert) which is where the pun comes from when Rimuru teases the spirit of Shizue inside him at a comedic panel of the manga at the end of the chapter.