Excel’s "Very Hidden" Sheets… even the Unhide menu can’t find them

Just learned that Excel has a "Very Hidden" sheet state.
Unlike normal hidden sheets, these don't show up in the “Unhide” menu at all.

To create one:

1. Press Alt + F11 to open VBA.
2. In the Project Explorer, right-click a sheet → Properties.
3. Change Visible from -1 (Visible) or 0 (Hidden) to 2 (Very Hidden).

Now, only VBA (or the Developer tab) can bring it back. Perfect to keep things tidy or prevent accidental edits.

Did anyone else know about this ninja-level Excel feature?