{Baru Fist of Kosa} with {Cackling Counterpart} or {Clone}
Sacrifice the copy then you get a wurm token.
Baru's ability asks you to discard a copy, not sacrifice one in play.
While they are in your hand, neither {Cackling Counterpart}, nor {Clone} are copies of Baru.
Bombo.
Oh whoops sry
No worries.
:)
You could copy the token with {clone} but that is not that great
Just don't try to {Clone} {Baru, Fist of Krosa}. Bad things happen. :'(