List of Eye of the North unique items by drop location

Unique items in italics drop from non-boss monsters

Far Shiverpeaks
1 Jormungand is not guaranteed to spawn here and can spawn in other areas of the Far Shiverpeaks

Epilogue
Each of the unique items in the Epilogue is obtained from collectors in exchange for one Droknar's Key instead of dropping from a boss.

Other
Some unique items are obtained from completing quests or fulfilling other requirements instead of dropping from a boss.