Elphaba wanders off, furious that she missed her chance to kill Morrible.
She has a burning desire to tell someone what she has done:
The Witch began to fret that she would be denied the credit for her deed. (5.7.3)
It seems she plans to take credit for killing Morrible after all.
So she heads to Avaric's house to tell him that she's now a murderer.
Yeah, she's kind of losing it.
Avaric doesn't know who she is at first, but then his memory is jogged.
He's still ridiculously good-looking and is now fabulously wealthy too.
Earlier that day Avaric saw the dwarf from the Philosophy Club and he swears Elphaba was there with them.
Elphaba makes her dramatic announcement:
"I came by to tell you that I killed Madame Morrible today," said the Witch. She was so proud of the phrase; it seemed less false when said aloud. Maybe it was true." (5.7.27)
Avaric has also developed a very dry sense of humor, and finds the idea of Elphaba coming to his house to declare herself a murderer more amusing than anything else.
So he invites her to stay for dinner.
The dinner guests are all very educated and wealthy and avant-garde.
They have a big discussion about what evil is.
Elphaba finally says she's leaving. The guests all applaud her as if her murder confession was dinner theater:
"The real thing about evil," said the Witch at the doorway, "isn't any of what you said. You figure out one side of it – the human side, say – and the eternal side goes into shadow. Or vice versa." (5.7.87)