So how exactly do I save Urm?

Hint 1 of 11:

Did you listen to Petroy?

Hint 2 of 11:

Put three items on the pedestal

Hint 3 of 11:

The first item is the lightning

Hint 4 of 11:

The second item is the sun in the cupboard

Hint 5 of 11:

Open the cupboard with the key

Hint 6 of 11:

The key that you found in the chest!

Hint 7 of 11:

The third item is something closely associated with Urm

Hint 8 of 11:

Look for some gold

Hint 9 of 11:

Try panning for gold

Hint 10 of 11:

Try sieving for nuggets in the river