How do I avoid the zombie on the first screen?

Hint 1 of 11:

Remember that Magician can make things grow.

Hint 2 of 11:

There's a hook just to the left of the hunchback that he can cast a spell on.

Hint 3 of 11:

Now you might want to see where you can go with that pole.

Hint 4 of 11:

Warrior will be able to climb the pole.

Hint 5 of 11:

Why don't you see what else Warrior can do from up there?