Absolute Favorite Opeth Riff

Blackwater Park(the song) has the most badass riffs of all Opeth songs.
I'll choose the heavy one which is played on the accoustic first and introduced by a "Ugh!".
 
Moonlapse vertigo 2nd riff in the intro (47 seconds in)
Serenity Painted Death (not the main riff, the one that starts at about 3:20, has the first clean vocals of the song over it)
The Leper Affinity (first riff, fucking brutal)
 
Oh, I'd just like to point out, Swano's riffs eat Opeth's for breakfast.
 
Advent at 8:11 is a good riff. But #1 would have to be The Moor at 4:57-5:27, yes I know they're 2 different riffs, but oh well :loco: .
 
I'd have to say the riff in the intro of The Twilight is my Robe. Also contains my favourite Åkerfeldt growl/scream/whatever probably as well.
 
To Bid You Farewell at 7:09, because I got laid to that.

But its a hard decision considering the first 2 Opeth albums are chocked full of so many awesome riffs. Whereas the latter ones arent.