How do I pass the Earth trial?

Hint 1 of 7:

The wall looks difficult to climb.

Hint 2 of 7:

Maybe you should turn it into something else.

Hint 3 of 7:

If you trigger the wall, it attacks you.

Hint 4 of 7:

How could you calm it down?

Hint 5 of 7:

Try casting the Calm spell.

Hint 6 of 7:

Now make your move towards the wall.