How do I get up to the wizard's desk?

It would help if you had something to climb on.

One of the things that Magician can do is to make plants grow.

There are two plants near the wizard's desk that Warrior could climb on,
if only they were tall enough.

So have Magician cast his spells on the plants -- specifically, the left
of the two.  You'll lose energy if you "spell" the one on the right.

Now the warrior can climb up the left plant and get to the desk.  The
only problem is that the right plant would like to eat our warrior.

So perhaps you should feed the plant.  The wizard must have some food
in his place somewhere.

Pot #1 on the desk has that food.  Pot #2 is dangerous, so don't open it.

Use the pot on the short plant, and it will eat the food and let Warrior
pass to the other end of the table.

But only Technician can carry things, so you'll need to get him up to the
table to pay the wizard.