"Aorta Borealis IV" is the fourth installment of The Mourn, and was the first to be released. It revolves around the proamate Kar'tahn.


1. Aphotic Currents 10

2. Everything That Exists

3. The Default Illusion

4. Meeting Arilayah

5. Kar'tahn

6. Undefined

7. Aphotic Currents 11

8. The Undergrowth

9. Eair'tra, The City of Kings

10. Return to the Arc

11. Fothcrah

12. The Maker's Tale

13. The Worst of Evils

14. Aphotic Currents 12


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