Powerless Sycrakea's Heart

Sycrakea has been gradually losing its power since the Black Stone NPC Knowledge Item disappeared. Even the spot where I planted my coral is gradually losing color. I'm sure it's because of a lack of circulation... but how can I restore it? I cannot restore this place if I do not go to the outside world, for there are no Black Stones to be found here. But since Vaha completely destroyed Talibre's Door... - Syca