How do I open the door in lost Izalith?

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Tags

1. #locked
2. #roots
3. #demon
4. #right
5. #reach
6. #level
7. #ruins
8. #facing
9. #servant
10. #izalith
11. #ground
12. #chaos
13. #covenant
14. #shortcut
15. #unlock
16. #floor