1- Blackwater Park.
It's one of the most awesome songs ever, especially the second half (after the ever repeating acoustic part in the middle) is terrifying. The lyrics go very well with the riffs and the general super bleak feel of the song. It's one of the few Opeth songs which lyrics do something lyrically, for me anyways.
Especially the "lepers coiled beneath the trees" part. Awesome.
2 - White Cluster
3 - Isolation Years
1283812 - Weakness. WHY OPETH??? WHY NOT CLOSE THE ALBUM WITH WHAT YOU YOURSELF NAMED "ENDING CREDITS?"