Ghost Tree ???

[Shayne]

I have just beat chapter 1 and entered chapter 2 and I went into the abandoned sewer and went  North into the greeren alleyway and i had captured all three munna i left and come back to see this thing. Previously a NPC referred to it as a ghost tree and in its place was a swirly pixelated Vortex that was very small and only took up one space but now this thing is here and I can't find any information on does anyone know what this thing is.  (forgive me if this is a horrible post it's my first one)

[dudeguyman]

Just do your thing, it'll make sense later.