He must watch the blue checkered leaf twist and flutter as it falls.
This is what the goblin has to do. He must be sure to see where it lands. He has to pick up and keep hold of the leaf. He then needs to gently part leaves and soil and dig down carefully until he finds the small key. He must then look around and look for the oak with the dead, drooping branch. There, he is to snap it off. This will reveal the tiny keyhole. Turning the key will partly open a door in the trunk. He must remove and keep hold of the key. Opening this fully will allow him to see the steps going down. These need to be taken until he finds himself at the beginning of a long corridor. At the very end there is a door. The door is locked. He must use the key to unlock the door and enter the secret chamber…
He cannot do any of this, yet.
He is watching for the blue checkered leaf to fall…