The One Song You Feel Defines Opeth

Moonlapse and the Moor for very obvious reasons. They are far from my favorite Opeth songs but showcase all their abilities in a very tight way. People saying BRI are just confusing me or probably didn't even read the damn question...You gotta love the clean vocals, emotional riffs and wonderful acoustic bits in BRI!! Its just automatic, isnt it ....
 
'The Drapery Falls' the defining moment? Definitely not for me, although this song kind of defines when their best period, their artistic height, was over.

For me, the track that truly defines Opeth is 'The Moor', because it has everything that is Opeth within it's twelve minutes playing time: acoustics, beautiful clean vocals/clean vocal melodies, interesting and complex drumming and riffing, growling, howling, a great, dark lyric...the only thing it perhaps lack is that immense atmosphere which Opeth managed to create on 'My Arms Your Hearse'.