Can I reveal Zhonya on my turn to send it to my base without using it to react to anything?

Ruling: Yes, you can reveal Zhonya on your turn at any time you can play a reaction, even if not in response to anything, and it will go to your base.

Nuances:

• You cannot reveal Zhonya on the same turn you hid it (standard hidden rules apply)
• Any reaction priority timing is valid for revealing it