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About Richard NP
No, he wasn't even talking about the mechanics of his NP at all. What happened was that one of the souls there is a mage and when he summoned the water ball of light Ayaka thought it was Magic, Richard then went to explain that its not Magic just magecraft, even though he doesn't have much experience himself. The difference between Magic and Magecraft has nothing to do with how his NP operates as he wasn't talking about it but was just trying to explain what one of his companions can do.
Also there's no mention of Black Magic or Sorcery in the scene, just Magecraft and Magic. The other two phrases just come from when some people on the forum was just joking eachother, thats it.