How can I get the cork at the top of the screen?

Hint 1 of 7:

The first thing is to make sure that you don't walk right to it.
You'll need to find a sneakier way up to the top of the tree.

Hint 2 of 7:

Again, remember that Magician can make plants grow.

Hint 3 of 7:

Have him cast a spell on the twig that's blowing in the wind.  It will
grow, and you can use the branch to get you up.

Hint 4 of 7:

Try having Warrior pull the end of the branch.  Do you notice how he makes
the branch dip down and shoot back up?

Hint 5 of 7:

It would be nice if another goblin were standing on the end of the branch.