Degree 1 - 8
(SOS,SOM,SUN) - obtainable from normal monsters / Uniques .
Degree 9 parts of set
(SOS) - obtainable from normal monsters (79 - 90 level) / Uniques.
Degree 9 accessories,weapons
(SOS) - obtainable from normal monsters (79 - 90 level) / Uniques.
Degree 9 weapons
(SUN) - obtainable as a reward from (Flame Mountain) - Burning Abyss Collection quest.
Degree 9 accessories
(SUN) - obtainable from Battle Arena (exchanger).
Degree 9 Set
(SOM,SUN) - obtainable by using Seal of Moon / Sun (sealed item).
Seal of Moon (sealed item) - obtainable from normal monsters (79 - 90 level) / Uniques.
Seal of Sun (sealed item) - obtainable from normal monsters (79 - 90 level) / Uniques.
Every drop depens on the level range don't forget about it.