So, here's my question; I want to enter the Sphere, BUT I DON'T WANT VALYGAR IN MY PARTY, and I don't want to kill him. Is it possible to enter the sphere without doing one or the other?
Answer: Yes, but you need Valygar in your party.
Am I missing something here?
The answer to your question is No, not Yes.
He said that I only need him in my party to open the Sphere, not enter it.