Use the 2 WORK GLOVES on the trap and then use the SHARP NUTSHELL on the boot. Use the BRANCH in the slit to get the TROWEL (Q).
Return to the Castle Ruins.
Place the 3 AMULET PIECES in the slots (R) and then zoom into the puzzle (S).
Solution: V, W, X, U, T, V, W, and U.
Dip the RAG in the oil to get the OILY RAG (S).
Use the OILY RAG on the helmet and then touch it (Y).
Talk to the knight spirit and then take the SWORD HANDLE (Z).
Return to the Lynx Den.