Question

What quality of ozymandias revealed in the last line

Answer 1

Ozymandias is another name for Egyptian pharoah Ramses II, whose vanity and building projects in memorialization of that vanity are legendary. Shelley relates a story told by a traveler in Egypt (an "ancient land") in which the person encountered a ruined monument to the king. Ozymandias's arrogance is still evident in the "sneer of cold command" depicted on the statue's face. But this face is lying half-covered in the sand.