Minor Spoiler!!
If you are a Sylvari and used the machine Scarlett did, The Pale Tree will be very worried about your mind and talk about she’s the barrier between you and the darkness. Mordremoth is that darkness she said. However, you are fine because you do not want to break the tie with her and your “will” is strong.
I’m not sure whether it has any connections to Nightmare Court or not.
However, any Sylvaris that cut ties with the Mother (Soundless) will be extremely vulnurable to get corrupted by Morde. So whole entire Ventry Bay is extremely in danger, maybe I can say goodbye to Malyck too.
On another note, every elder dragon has its dragon champion, but we see none from Morde.
Maybe it’s possible that Morde champion dragon may come in the form of the tree just like Pale Tree.?
Also, there is this destructible “strangling vine” in Wychmire Swamp looking extremely similar to Mord’s vine.
Is he already invading the Pale Tree?