Poe uses on the line "Desolate yet all undaunted, on this desert land enchanted" the following poetic device:
A. Alliteration.
Poe uses alliteration. Alliteration is the conspicuous repetition of identical initial consonant sounds in successive or closely associated syllables within a group of words, even those spelled differently.
In this case, you can see (or more precisely, hear) the alliteration with the sounds of the words that begin or contain 'd',
