You can find Omen of Whittling in Viridian Wildwood

it does drop omens yes , its kinda the idea of that unique map no?

You can get any omen from Wildwood, but in my experience it’s so rare to get a rare omen that it just isn’t worth running (outside SSF). In trade league, it’s muchore reliable to craft/trade for a solid ritual setup and get purple omens that way.

you "can", but will you?

I got a whittling from here during the campaign

If you're very, very, very, very, very, very, very lucky.