favourite opeth riff !?

right now I'm digging two riff passages in "Baying of the Hounds"

1st one is in the middle of the song after Mikael is singing "Beneath the mire..." I love that riff, it's so depressing and moving.

2nd one is at the end of the song, after the clean guitar playing. I love it because it sounds atmospheric to me.
 
Well I love way too many of their riffs, but a top fiver would be the section in Bleak in the 6 min. area I think right before the 2nd 'chorus' comes back. Also, one of my faves has to be the riff in White Cluster in between the solos, as well as during the solos. How glad I am that Akerfeldt confused himself with Dave Mustaine right there.
 
Let's start with the opening riff of In mist she was standing (0:00 to 1:40),
The second riff of that song is amazing as well (1:40 to 2:05)...
and so on
 
Funeral Portrait: 7:16 to the end of song, including the following solos over this same riff. I realize solos are not riffs but this song has opeth's best solos imo.

April Ethereal: 3:08 to 3:33, 4:42 to 5:30, 6:01 to 6:43

Reverie/ Harlequin Forest: 8:17 to 9:10

The Leper Affinity: 1:29 to 2:11, 5:38 to 6:52.
 
The short lick before the intro riff, and the first acoustic riff in Blackwater Park