Board Thread:General Discussion/@comment-28179649-20170304130412/@comment-27465367-20170925091551

The Real Knife is just the normal dagger, believe me. In Chara's mind, it's the most powerful thing in the universe, but outside it, it's just a little bit stronger than an empty gun.

Once I hacked it for Undyne the Undying, and know what? Usual damage of the shoes. And answering your question, it's just what happens when you kill anyone with any other weapon. Yea, the Real Knife isn't this special.

However, good things for you - someone told me the Real Knife can kill Amalgamates and it also kills Toriel even when the attack doesn't deplete her entire health bar (glitch). About the Amalgamates, I don't know if it"s true.