Head right and after climbing over the felled tree smash the LEGO objects beyond. Don’t get caught in the light as the Nazgul will sense you!
From this a LEGO stone will emerge. Throw the stone at the LEGO bird as indicated by a marker. This will startle the Nazgul who will ride on.
Continue right and, as Sam, use the LEGO Dig Spot to uncover another stone. Throw this at the bird again as indicated, which will cause the Nazgul to move on.
Head over to the tree containing the LEGO Crawl Hatch. Use it to climb into the branches and cross the LEGO Balance Beam to scare the bird.
With the Nazgul scared off move right to the LEGO Dig Spot. Here Sam can cause a large LEGO flower to grow allowing access up the adjacent boulder.